ACT Practice Test

If the perimeter of a rectangular garden is 60 feet and the length is twice the width, what is the area of the garden?

If \(f(x) = 2x^2 - 3x + 5\) and \(g(x) = x - 2\), what is \(f(g(3))\)?

A rectangle is three times as long as it is wide. If the length and width are both increased by 5 feet, the area becomes 100 square feet. What were the original dimensions?

A train travels from Station A to Station B at 60 mph and returns at 40 mph. What is the average speed for the round trip if both segments are the same distance?

A square and a rectangle have the same perimeter. The rectangle's length is twice its width. If the side of the square is 10 units, what is the area of the rectangle?

A circular park with a radius of 30 feet is surrounded by a walkway of uniform width. If the total area of the park and walkway is four times the area of the park alone, what is the width of the walkway?

A clock shows the time as 3:15. What is the angle between the hour and the minute hands?

If 8 workers can complete 6 tasks in 3 hours, how many hours would it take 4 workers to complete 9 tasks?

A ladder 25 feet long is leaning against a wall. If the base of the ladder is 7 feet from the base of the wall, how high on the wall does the ladder reach?

Two angles are supplementary. If one angle is 30 degrees less than four times the other, what is the measure of the larger angle?

A train leaves from City A to City B at a speed of 80 km/h. Two hours later, another train leaves from City B to City A on a parallel track at a speed of 100 km/h. If the distance between City A and City B is 720 km, how far from City A do the trains meet?

A train leaves from City A to City B at a speed of 80 km/h. Two hours later, another train leaves from City B to City A on a parallel track at a speed of 100 km/h. If the distance between City A and City B is 720 km, how far from City A do the trains meet?

If \(5^x \times 5^{x+2} = 5^{11}\), what is the value of \(x\)?

Three numbers are in the ratio 3:4:5 and their sum is 60. What is the largest number?

If \(x\) and \(y\) are numbers such that \(x + y = 10\) and \(xy = 16\), what is \(x^2 + y^2\)?

A sequence is defined as \(a_n = n^2 + n - 1\). What is the fifth term of the sequence?

A square and a circle have the same perimeter. If the side of the square is 10 units, what is the area of the circle?

A cube has a volume of 64 cubic units. What is the surface area of the cube?

In a right triangle, the lengths of the legs are 7 units and 24 units. What is the length of the hypotenuse?

A rectangle's length is decreased by 4 units and its width is increased by 3 units, resulting in no change to the area. If the original dimensions of the rectangle were 12 units by 5 units, what is the new length and width?

A square and a rectangle have the same area. The rectangle's length is twice its width. If the side of the square is 12 units, what is the perimeter of the rectangle?

A container initially holds 10 gallons of water. Water is added at a rate of 2 gallons per minute, and at the same time, water leaks out at a rate of 0.5 gallons per minute. After 10 minutes, how many gallons of water are in the container?

A rectangular field is three times as long as it is wide. If decreasing the width by 10 meters and increasing the length by 30 meters doubles the area, what was the original width?

A cylindrical tank has a radius of 5 feet and is filled with water to a height of 12 feet. If the water is drained until the height of the water is 4 feet, what is the volume of water remaining in the tank?

If \(z\) and \(w\) are complex numbers such that \(z = 3 + 4i\) and \(w = 1 - 2i\), what is \(z \cdot w\)?

If the function \(f(x) = \frac{3x - 7}{2x + 5}\) is defined for all real numbers except \(x = -\frac{5}{2}\), what is \(f\left(\frac{1}{f(-3)}\right)\)?

A cube has a volume of \(8x^3\) cubic units. If each side of the cube is multiplied by 3, what is the new volume?

What is the minimum value of the function \(h(t) = t^4 - 4t^3 + 6t^2 - 4t + 5\)?

If \(g(x) = x^3 - 4x^2 + x + 6\) and \(g(k) = 0\), which of the following could be a possible value of \(k\)?

The function \(f(x) = a^x\) passes through the point (2,9). What is the value of \(a\)?

The equation \(\frac{1}{x-1} + \frac{1}{x+1} = \frac{2}{x}\) is valid for all \(x\) except:

What is the sum of the solutions to the equation \(\sin^2 x - \sin x - 6 = 0\) over the interval \([0, 2\pi]\)?

What is the solution set to the equation \(\sqrt{9x^2 - 54x + 81} = 3x - 9\)?

What are the roots of the equation \(x^3 - 2x^2 - 5x + 6 = 0\)?

Given the sequence defined by the recursive formula \(a_{n+1} = 3a_n + 1\) with \(a_1 = 1\), what is \(a_4\)?

The sides of a triangle are given by \(x\), \(x+1\), and \(x+2\). If \(x+2\) is the longest side, what is the range of possible values for \(x\)?

If \( i \) is the imaginary unit, what is the product \( (3 - 4i)(3 + 4i) \)?

A geometric series has a first term of 5 and a common ratio of \(\frac{1}{2}\). What is the sum of the first 6 terms?

If the inequality \(|x - 5| > 7\) is true, which of the following represents all possible values of \(x\)?

What is the area of a triangle with vertices at \((0,0)\), \((4,0)\), and \((0,3)\)?

If the set \(S\) contains all solutions \(x\) to the inequality \(x^2 - 3x - 18 \leq 0\), what are the interval bounds of \(S\)?

If the function \( f(x) = \frac{x^2 - 1}{x - 1} \) is evaluated for \( x \neq 1 \), which expression is equivalent to \( f(x) \)?

How many integer solutions satisfy the inequality \( |x - 3| > 2 \)?

The function \(f(x) = \frac{2x}{x^2 + 1}\) reaches its maximum on the interval \([-1, 2]\) at \(x =\):

Solve for \(x\) in the equation \(4^{x+1} = 16^x\).

If the points (1,1), (4,y), and (9,9) lie on the graph of a quadratic function \(y = ax^2 + bx + c\), what is the value of \(y\) when \(x = 4\)?

If \( \log_2 (8x) = 6 \), what is \(x\)?

A circle has equation \( x^2 + y^2 + 6x - 4y + 9 = 0 \). What is the radius of this circle?

For \( f(x) = \sqrt{2x + 3} \), what is the domain of \( f \)?

What is the sum of the solutions to the equation \( 2x^2 - 8x + 8 = 0 \)?

The roots of the equation \(x^2 - 8x + 15 = 0\) are:

For the circle with equation \((x - 4)^2 + (y + 3)^2 = 16\), what are the coordinates of its center and the length of its radius?

What is the remainder when the polynomial \( x^3 - 4x^2 + x + 6 \) is divided by \( x - 2 \)?

A cubic function \( f(x) = x^3 - 6x^2 + 9x \) has a factor \( x \). What are the other factors?

The equation \( e^{2x} - 7e^x + 10 = 0 \) can be rewritten as a quadratic equation. What are the roots?

Given the function \( f(x) = \frac{x^2 - 4x + 4}{x - 2} \), what is the value of \( f(2) \)?

What is the vertex of the parabola represented by the equation \( y = 3(x - 2)^2 - 5 \)?

For the equation \( \sqrt{3x+15} = x + 3 \), what is the value of \( x \)?

If \( f(x) = \frac{1}{x-1} \) and \( g(x) = \frac{1}{x+1} \), what is \( f(g(1)) \)?

If \( \log_b(3) = a \) and \( \log_b(5) = c \), what is \( \log_b(45) \) in terms of \( a \) and \( c \)?

Which of the following alternatives to the underlined portion would NOT be acceptable in terms of logical consistency within the sentence: "Despite being allergic to shellfish, Kevin devoured the shrimp, leading to a severe allergic reaction."

In the sentence, "The author starts her book with a personal anecdote, then cites numerous studies, finally arguing her point effectively," which of the following would be the most appropriate replacement for the underlined portion "finally arguing her point effectively" to maintain parallel structure?

Which choice best maintains the formal tone and style of the following sentence: "The committee concluded that, based on the evidence presented, the policy should be revised."

In the sentence, "Her thesis, which argued that children learn best in a structured environment, was groundbreaking in its field," which alternative to the underlined portion would introduce an error in logic?

Which replacement for the underlined part maintains the clarity and accuracy of the information in the sentence: "The scientist claimed her data was indisputable, which lead to a significant endorsement from the board."

In the sentence, "After years of research, the archaeologist found the location of the ancient city, which he has sought for so long," which correction is needed to address a tense inconsistency?

Which of the following revisions correctly addresses an ambiguity in the sentence: "He told his brother that he would leave the city soon."

In the sentence, "The historian wrote a book, which includes detailed maps, a comprehensive timeline, and it summarizes the events of the era," which correction best maintains parallelism?

Select the option that introduces an inconsistency in style to the sentence: "The report, drafted meticulously, was submitted on time."

Which version of the underlined portion would incorrectly suggest a causal relationship in the sentence: "The team celebrated after the game, their efforts were recognized by the coach."

In correcting the vague pronoun reference in the sentence, "When the manager spoke to the employees, they were confused," which revision is most effective?

Select the option that corrects the run-on sentence without altering its meaning: "She studied late into the night she was determined to pass the exam."

Which of the following introduces a redundancy into the sentence: "The scientist observed the results of the experiment."

In the sentence "The novel's protagonist, a courageous young woman, inspires readers and creates a strong impression," which word best replaces "creates" to enhance consistency and style?

Which revision corrects the awkward construction in the sentence: "The artist sold her painting to a collector, and she felt very happy about it."

Identify the option that corrects an illogical comparison in the sentence: "Her cooking skills are better than any chef."

Which revision addresses a lack of specificity in the sentence: "The company expanded its outreach."

Select the choice that introduces an error in subject-verb agreement in the sentence: "The panel of experts has agreed on the solution."

Which revision fails to correct a dangling modifier in the sentence: "Walking through the park, the flowers looked beautiful."

Which option introduces an error in idiom usage in the sentence: "She has a knack for solving complex problems."

In the sentence "The book provides a detailed account, which includes many historical figures and events," which replacement for the underlined portion would be least appropriate?

In the sentence "After reviewing the budget, the proposal by the finance team was approved," which revision corrects the misplaced modifier?

Which version uses the most concise and clear language to describe the subject's abilities?

In revising the following sentence, which option most effectively applies conventions regarding redundancy? "During their vacation, they saw a variety of different animals at the zoo."

Which choice corrects an error in parallelism? "Julie enjoys reading, to write, and painting."

Which choice best combines the following sentences into one, using appropriate and concise language? "Lucas won the science fair. He did this with his innovative project on solar energy."

Which option best revises the sentence for clarity and precision? "They visited museums, parks, and also they went to several concerts."

Identify the sentence that most effectively uses concise language. "Sarah, who is my cousin, and who is a lawyer, will be visiting us next week."

Which of the following choices best corrects the awkward construction in the sentence? "Having finished the assignment, the TV was then turned on by Jill."

Select the option that effectively clarifies the pronoun reference in the sentence. "After the lawyer spoke to the jurors, they were visibly confused."

Which choice most effectively avoids a vague pronoun reference? "Sam and Jess were discussing the project, and he was very enthusiastic about it."

Which sentence revision avoids redundant language? "Each and every participant who entered the contest was given a certificate."

Select the revision that best corrects the misplaced modifier in the sentence. "Hungry, the leftovers in the fridge were quickly eaten by Julia."

Which option most effectively simplifies the sentence while maintaining its original meaning? "In order to apply for this job, applicants must be able to demonstrate that they have the ability to communicate effectively."

In improving the sentence, which option best corrects a nonparallel structure? "The committee requires a detailed plan, a budget estimate, and you must also submit a timeline."

In the following sentence, identify the correct form of the verb: "Neither the manager nor his employees __________ satisfied with the new policy."

Choose the option that correctly uses the possessive form: "The success of the project depends on the team leaders ________ cooperation."

Which option correctly completes the sentence with the proper use of a reflexive pronoun? "Jason prepared the meal all by ________."

Identify the correct use of a comparative adjective in this sentence: "This math problem is ________ than the one we did yesterday."

Select the correctly punctuated sentence regarding the use of commas:

Choose the option that correctly completes the sentence with the appropriate conjunction: "She must finish her homework before she can watch television, ________ she will not be able to go to the movies tomorrow."

Which option correctly uses an indefinite pronoun in the sentence? "________ of the decorations need to be replaced."

Identify the option that correctly addresses an error of subject-verb agreement: "The list of items __________ missing from the box."

Which sentence correctly uses a semicolon?

Select the option that corrects an improper use of a modal auxiliary: "She can has completed the project on time."

Choose the sentence that correctly uses parallel structure:

Identify the correct use of a colon in the following sentence:

Which sentence is grammatically correct in the context of agreement between subject and predicate?

Choose the option that correctly punctuates this complex sentence:

Identify the correct use of an apostrophe in this possessive case:

Select the option that correctly addresses an error of dangling modifier:

Which sentence correctly uses a complex sentence structure?

Choose the option that correctly uses an intensive pronoun:

Identify the sentence that correctly uses a subordinate clause:

Select the sentence that appropriately uses a relative clause:

Identify the correct use of an interjection in this sentence:

Which sentence correctly uses a correlative conjunction?

Choose the option that correctly punctuates the use of a conjunctive adverb:

Select the correctly formatted compound sentence:

Which sentence correctly avoids a comma splice?

Identify the sentence that correctly uses an indefinite article:

Select the sentence that properly uses subjunctive mood:

Choose the sentence that appropriately uses an appositive:

Which option demonstrates the correct use of a past perfect tense verb?

Identify the correct use of a quantifier in the sentence:

Select the sentence with the correct placement of an adverb:

Which sentence properly uses a split infinitive?

Identify the sentence that correctly uses a gerund:

Choose the sentence that correctly uses an ordinal number:

Select the option that correctly capitalizes a title:

Which sentence correctly uses a possessive case?

Identify the sentence that appropriately uses a comparative adjective:

Choose the option that correctly uses an absolute phrase:

Which sentence correctly uses a nonrestrictive clause?

Identify the correct use of a quantifier in the sentence:

In a story, a character spends hours each day observing a garden. What might this behavior suggest about the character's state of mind?

A biography mentions that a leader was both revered and criticized for their decisions. What might be the best interpretation of this statement?

In a novel, a protagonist often reads books on philosophy and introspection. What might this suggest about the protagonist's character?

A narrative describes a bustling city where everyone seems to be in a hurry. What might be the underlying message about urban life?

In a historical text, a leader is described as "a lion in battle but a lamb at home." What does this metaphor suggest about the leader's personality?

An article discusses a scientist who spent decades researching a single topic. What does this imply about the scientist's approach to work?

In a novel, a character consistently avoids conflict and prefers peace. What might this behavior indicate about the character's worldview?

An essay describes a landscape painting that conveys a sense of desolation. What might be a key feature of the painting that contributes to this feeling?

In a story, a character frequently gazes out to sea, contemplating the horizon. What might this symbolize in the context of the narrative?

A biography mentions that an inventor had a "eureka moment" after years of failed experiments. What does this phrase suggest about the inventor's journey?

In a story, a character often talks about his childhood with great fondness and nostalgia. What does this suggest about the character's current life?

A novel describes a city that's always shrouded in mist and fog. What might this atmospheric detail indicate about the setting?

A passage describes a character who is constantly checking his watch and rushing through tasks. What might this behavior suggest about the character's mindset?

In a story, a group of friends embarks on a journey through a dense forest. What might the forest symbolize within the context of the narrative?

An autobiography describes a person who enjoys working alone and finds comfort in solitude. What might this reveal about the author's personality?

A novel features a character who often visits an isolated cabin in the woods to write poetry. What might this setting reveal about the character's approach to creativity?

In a narrative, a protagonist continually returns to a specific place in their hometown, despite having traveled widely. What might this repetition signify?

An essay describes a leader who frequently uses metaphors to explain complex concepts. What might this technique indicate about the leader's communication style?

A narrative mentions a family that has a tradition of gathering every weekend for a meal. What does this detail suggest about the family?

In a historical text, a military leader is described as "leading from the front." What does this phrase imply about the leader's style?

A passage describes a scientist who is known for conducting unconventional experiments. What might this suggest about the scientist's approach to research?

In a story, a group of friends embarks on a journey through a dense forest. What might the forest symbolize within the context of the narrative?

In a passage describing a character's journey through a city, the author often uses descriptive language to emphasize the chaotic environment. Which of the following narrative techniques is most likely used to convey this sense of chaos?

An author uses metaphors throughout a passage to describe a challenging situation. What effect does this technique have on the reader's understanding of the context?

In a passage, an author uses irony to depict a character's actions. Which of the following best describes the purpose of irony in this context?

An author uses a repeated phrase at various points throughout a passage. This technique is most likely employed for which of the following purposes?

A passage contains a series of rhetorical questions. What is the most likely reason an author would use this technique in the context of an argumentative text?

In a passage, the author frequently uses parallelism. Which of the following best describes the effect of this technique on the structure of the text?

An author uses an unreliable narrator in a story. Which of the following is the most likely reason for employing this narrative technique?

In a passage, the author uses shifting perspectives to tell the story from multiple viewpoints. What is the main effect of this narrative approach?

A passage describes a sequence of events that seem unrelated but later connect in a significant way. What is the likely purpose of using this technique?

An author uses imagery extensively throughout a passage. What is the primary benefit of this technique for the reader's understanding of the text?

A passage employs a non-linear storytelling technique, where the events are not presented in chronological order. What is the most likely reason for using this narrative structure?

In an article discussing climate change, the author uses the metaphor "the earth's thermostat is broken." What is the most likely reason for the author using this metaphor?

In a historical analysis of the Civil Rights Movement, the author cites a wide range of sources, including newspaper articles, interviews, and government reports. What is the primary benefit of this approach to the author's argument?

In a literary review, the author describes a character's journey as "a winding path through uncertainty and despair." What does the metaphor "a winding path" most likely suggest about the character's journey?

In a science article about genetics, the author uses the analogy of a "blueprint" to describe DNA. What does this analogy most likely suggest about the role of DNA in an organism?

An author writing about technological innovation describes a particular invention as "a double-edged sword." What does this metaphor imply about the invention?

In an analysis of a political speech, the author notes that the speaker uses repetition to emphasize key points. What is the most likely effect of this rhetorical technique on the audience?

In a philosophical essay, the author uses the analogy of a "slippery slope" to describe a particular course of action. What does this analogy imply about the potential outcomes of this action?

In an analysis of a novel, the author describes the setting as "a character in itself." What does this description most likely suggest about the setting's role in the story?

In a critical review of a film, the author describes the cinematography as "painting with light." What does this description most likely suggest about the film's visual style?

In a literary analysis, the author describes the narrative structure as "a tapestry woven with multiple threads." What does this metaphor suggest about the narrative structure?

In a cultural critique, the author describes a certain trend as "a canary in the coal mine." What does this metaphor most likely indicate about the trend?

A bar graph shows the average rainfall in inches for four months in a given year: January (5 inches), February (3 inches), March (7 inches), and April (4 inches). What is the total rainfall for the first four months?

A scatter plot shows a positive correlation between temperature and plant growth. If the temperature increases by 10 degrees, how much does plant growth increase if the correlation coefficient is 0.9?

A graph shows the volume of a gas versus its pressure at a constant temperature, indicating an inverse relationship. If the pressure is doubled, what happens to the volume?

A bar graph shows the frequency of four different bacteria types in a lab. If the graph shows 12 Type A, 8 Type B, 5 Type C, and 15 Type D bacteria, what percentage of the total bacteria are Type B?

A line graph depicts the number of customers in a store during business hours. The number starts at 20 customers, peaks at 80 customers, and then decreases to 40 customers. If this pattern occurs within a 12-hour period, what is the average change in customer count per hour over the first 6 hours?

A scatter plot shows a positive correlation between study hours and test scores for a class of students. If a student increases their study time by 5 hours and sees an average increase of 10 points in their test score, what can be inferred about the relationship between study time and test scores?

A scatter plot shows a negative correlation between temperature and fish population in a lake. If the temperature increases by 10 degrees, how much does the fish population decrease if the correlation coefficient is -0.75?

A table shows the data for the population of a certain species of birds in five different regions: Region A (50 birds), Region B (40 birds), Region C (60 birds), Region D (55 birds), and Region E (45 birds). What is the median population for these regions?

A line graph shows the speed of a train over time. It starts at 0 km/h, accelerates to 90 km/h within 15 minutes, and then decelerates to 60 km/h over the next 10 minutes. What is the average acceleration during the first 15 minutes?

A table lists the pH values for five different substances: Substance A (7.5), Substance B (8.0), Substance C (6.5), Substance D (9.0), and Substance E (7.0). What is the mode pH value among these substances?

A bar graph displays the frequency of four different species of insects in a forest. If the graph shows 50 Species A, 30 Species B, 40 Species C, and 60 Species D, what percentage of the total is Species C?

A scatter plot shows a linear relationship between hours of exercise and weight loss. If a person exercises for 10 hours and loses 5 kg, how much weight is expected to be lost by a person who exercises for 30 hours?

A graph shows the growth of a tree over a 10-year period. The tree's height begins at 2 meters, grows to 8 meters over 5 years, and reaches 10 meters by the end of the 10-year period. What is the average rate of growth during the first 5 years?

A bar graph displays the number of cars sold in four months: January (50 cars), February (40 cars), March (60 cars), and April (70 cars). What is the average number of cars sold per month?

A researcher is conducting an experiment on the growth of bacteria in petri dishes. If a petri dish has bacteria that doubles every 2 hours, how many times will the bacteria double in 8 hours?

A scientist studies a new material and notices that its density is influenced by its temperature. Given that density is mass per unit volume, if the temperature is increased, which of the following outcomes would most likely be observed?

A scientist observes that plants grown under certain conditions produce more fruit. If these plants are grown under 10 hours of light daily, how would the results likely change if the plants are subjected to 12 hours of light daily?

In an experiment, a scientist uses varying amounts of salt to determine its effect on boiling point. If the boiling point of a solution increases with more salt, what is the most likely reason?

A chemical reaction occurs in a closed system, and a gas is released as a byproduct. If the gas is contained in a balloon, what happens to the balloon's volume if the gas is allowed to expand in a larger container without changing pressure or temperature?

In an experiment to determine the optimal growth conditions for bacteria, scientists vary the temperature in a series of test tubes containing bacteria. If the bacteria grow best at a specific temperature, what would you expect to see in the results?

An experiment involves dropping a metal object into a beaker filled with a chemical solution. If the metal starts to dissolve upon contact with the solution, which of the following best explains this observation?

A scientist observes the migration patterns of birds over a 10-year period. If the number of birds migrating annually decreases, which of the following is the most likely cause?

A researcher is conducting an experiment to test plant growth under different soil conditions. If one group of plants receives soil with high nitrogen content while the other group receives regular soil, what would likely be observed in the results?

A scientist observes a population of insects over a year. If the population decreases during the colder months and increases during the warmer months, what might be the best explanation for this pattern?

A scientist is investigating the effects of different soil types on plant growth. She uses three types of soil: sandy, loamy, and clay. She plants the same species of plant in each type of soil and measures their growth over a month. The plants in the loamy soil grow the tallest. Which of the following can be inferred from this experiment?

A researcher wants to determine whether a specific vitamin supplement affects muscle growth. She uses two groups of subjects: one group takes the supplement daily, while the other does not. After 12 weeks, she measures the muscle growth in both groups. The group taking the supplement has significantly more muscle growth. Which of the following is the best conclusion from this study?

A laboratory conducts an experiment to test the effect of varying light intensities on the rate of photosynthesis in plants. The results indicate that photosynthesis increases with light intensity up to a certain point, after which it levels off. What can be concluded from these results?

An experiment measures the impact of water temperature on the rate of chemical reactions in a solution. The results show that the rate of reactions increases with water temperature, but then sharply decreases at a certain point. What inference can be made from this result?

A group of scientists is studying the migration patterns of birds. They set up tracking devices on several species and observe their migration routes. They notice that all the observed species follow similar paths during migration. Which of the following could be inferred from this observation?

An experiment is conducted to test the effect of varying pH levels on plant growth. The results indicate that plant growth is optimal within a specific pH range but declines significantly outside that range. What can be inferred from these results?

A scientist wants to test if varying amounts of fertilizer affect plant growth. She applies different amounts of fertilizer to three groups of plants and measures their growth. The group with the highest amount of fertilizer shows reduced growth. What can be inferred from this experiment?

A team of researchers is investigating whether varying sound frequencies affect plant growth. They expose plants to different frequencies and measure growth over time. The plants exposed to higher frequencies show reduced growth. What inference can be drawn from these results?

An experiment is conducted to test whether varying carbon dioxide (CO2) levels affect plant growth. Plants are placed in chambers with different CO2 concentrations, and their growth is monitored. The results show that plant growth increases with higher CO2 levels but plateaus after a certain point. What can be concluded from these results?

A group of scientists is studying the impact of various water salinity levels on fish behavior. They place fish in tanks with different salinity levels and monitor their movement and feeding patterns. The fish in the highest salinity tank exhibit decreased activity and reduced feeding. What can be inferred from this experiment?

An experiment is conducted to test the effect of various light colors on plant growth. Plants are exposed to different light colors, and their growth is measured. Plants exposed to red light show the most significant growth, while those exposed to blue light grow the least. What inference can be made from this experiment?

A team of researchers is testing the impact of various humidity levels on plant growth. Plants are placed in controlled environments with different humidity levels and their growth is measured. The plants in environments with moderate humidity levels grow best, while those in very high or very low humidity environments grow poorly. What inference can be drawn from these results?