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  1. AP Calculus
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Differential Equations

Question 1
college-boardCalculus AB/BCAPExam Style
1 mark

If a population grows continuously at a rate of 8% per year, which of the following represents the population as a function of time t, given an initial population of 5000?

Question 2
college-boardCalculus AB/BCAPExam Style
1 mark

If you are given a differential equation in the form dAdt=rA\frac{dA}{dt}=rAdtdA​=rA where rrr is constant, which statement is true about the solution for A(t)A(t)A(t)?

Question 3
college-boardCalculus AB/BCAPExam Style
1 mark

If the population of a species growing according to the differential equation dpdt=0.3p\frac{dp}{dt} = 0.3pdtdp​=0.3p, what is the expression for the population ppp at time ttt if there were initially 200 individuals?

Question 4
college-boardCalculus AB/BCAPExam Style
1 mark

The solution to the differential equation dydx=5y\frac{dy}{dx} = 5ydxdy​=5y with an initial condition y(0)=2y(0) = 2y(0)=2 is given by:

Question 5
college-boardCalculus AB/BCAPExam Style
1 mark

Given an initial condition for a model dPdt=rP(1−PK)\frac{dP}{dt} = rP(1-\frac{P}{K})dtdP​=rP(1−KP​), where P represents population at time t, what does K represent?

Question 6
college-boardCalculus AB/BCAPExam Style
1 mark

Given a population that grows at a continuous rate of 3% per year, which of the following represents the rate of change of the population at any given time t?

Question 7
college-boardCalculus AB/BCAPExam Style
1 mark

In setting up initial conditions based on a problem involving a population modeled on a logarithmic scale according to the equation dNdT=gNlog⁡(NN0)\frac{dN}{dT}=gN\log(\frac{N}{N_0})dTdN​=gNlog(N0​N​), under what circumstances might issues arise regarding N's ability to remain fully functional in terms of ensuring the ongoing validity of those sam...

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Question 8
college-boardCalculus AB/BCAPExam Style
1 mark

If the population of a species grows according to the exponential model P(t)=P0ektP(t) = P_0 e^{kt}P(t)=P0​ekt, where k>0k > 0k>0, what is the limit of P(t)P(t)P(t) as ttt approaches infinity?

Question 9
college-boardCalculus AB/BCAPExam Style
1 mark

The size of a certain fish population modeled by the differential equation dNdt=aN−bN2\frac{dN}{dt} = aN - bN^2dtdN​=aN−bN2, where N is the fish population, a and b are positive constants. If b increases while the number of fish remains the same, which of the following correctly describes the relation between dNdt\frac{dN}{dt}dtdN​ and the population growth rate?

Question 10
college-boardCalculus AB/BCAPExam Style
1 mark

Which of the following represents the solution to the differential equation dydx=0.02y\frac{dy}{dx} = 0.02ydxdy​=0.02y?