AP®︎ Calculus BC: Topic 7.8 Practice Test

Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 7.8 of AP Calculus BC – Exponential Models with Differential Equations.


Questions List

Topic 7.8

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Question 1 Easy

The number of bacteria BB in a culture grows at a rate proportional to the number of bacteria present, with tt measured in hours. Which differential equation models BB, where kk is a positive constant?

AdBdt=kB\frac{dB}{dt} = kB
BdBdt=kt\frac{dB}{dt} = kt
CdBdt=k\frac{dB}{dt} = k
DdBdt=B+k\frac{dB}{dt} = B + k

What You’re Being Tested On:

Explore the learning objectives taken directly from the College Board’s AP® Calculus BC Curriculum. Ensure you’re prepared for the exact topics covered on the AP® exam, in-class tests, and quizzes, and gain confidence in your mastery of the material.

Topic 7.8: Exponential Models with Differential Equations

Learning Objective: FUN-7.F

Interpret the meaning of a differential equation and its variables in context.

Essential Knowledge: FUN-7.F.1

Specific applications of finding general and particular solutions to differential equations include motion along a line and exponential growth and decay.

Essential Knowledge: FUN-7.F.2

The model for exponential growth and decay that arises from the statement "The rate of change of a quantity is proportional to the size of the quantity" is dy/dt = ky.

Learning Objective: FUN-7.G

Determine general and particular solutions for problems involving differential equations in context.

Essential Knowledge: FUN-7.G.1

The exponential growth and decay model, dy/dt = ky, with initial condition y = y0 when t = 0, has solutions of the form y = y0 e^{kt}.