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AP Precalculus Practice Test UNIT 2

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About this Exam

Prepare with the AP Precalculus Practice Test UNIT 2 practice quiz. This question bank includes 22 questions covering term, bacteria, sequence, hours, and number. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

Sample Questions

Question 1
Which of the following functions given below are equivalent? I. f(x) = (2) 3−x II. g(x) = 8 · 2 −x III. h(x) = \frac{8} {2^{x}}
I, III, and IV
I and II only
(B)
I, II, and III
Explanation:
Correct answer: I, II, and III
Question 2
When exposed to sunlight, the number of bacteria in a culture decreases exponentially at the rate of 10% per hour. What is the best approximation for the number of hours required for the initial bacteria to decrease by 50%?
6.6
5.3
7.3
7.9
Explanation:
Correct answer: 6.6
Question 3
A culture of 3,000 bacteria triples every 40 minutes. If P(t) represents the size of the bacteria population after t minutes, which equation can be used to model the exponential growth of these bacteria?
a n = −7.5 + 3.2n
P(t) = 3,000 (3) t/40
6.6
4
Explanation:
Correct answer: P(t) = 3,000 (3) t/40
Question 4
A radioactive substance has an initial mass of 250 grams, and its mass halves every 5 years. Which equation shows the number of grams, M(t), remaining after t years?
P(t) = 3,000 (3) t/40
M(t) = 250 (½) t/5
6.6
x = −2, 2
Explanation:
Correct answer: M(t) = 250 (½) t/5
Question 5
A scientist studying bacteria growth notices interesting behavior with the replication of cells over the course of 24 hours. She records her description of the behavior in hopes of writing a function that can be used to make predictions for future bacteria growth. She observed that for the first 8 hours, the number of bacteria, y, increases at a constant rate of 10 cells per minute. After the initial 8 hours, the number of bacteria varies inversely with time, x, with a proportional constant of 3 for the next 10 hours. Between hour 18 through hour 20, the bacteria decrease at a constant rate of 5 cells per minute. In the last 4 hours, the bacteria double in growth every minute. Which of the following models best fits the scientist’s observations?
(A)
g k = a(e k )
I, II, and III
I and II only
Explanation:
Correct answer: (A)

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Additional Information

AP Precalculus Practice Test UNIT 2

This practice set contains 22 questions from the matching question bank and focuses on term, bacteria, sequence, hours, and number. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Frequently Asked Questions

This quiz contains a total of 22 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.

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