Q: Which of the following is the correct definition of the derivative of a function $$f(x) at a $$point $$x=a$$?

$$f'(a) = \lim_{h \to 0} \frac{f(a+h) - f(a)}{h}$$

Q: A medication is metabolized in the body according to $$C(t) = 100e$$^{-0.3t}$$, where C$ is the concentration in mg/L and t$ is time in hours. What is the rate at which the concentration is changing at t = 2$ hours?

$$C'(2) = -30e$$^{-0.3 \times 2}$$

Question 1

Which of the following best describes the primary application of derivatives in the life sciences?

Accepted Answer

To analyze rates of change in biological processes, such as population growth or decay.

Question 2

Given the function $$f(x) = 3x^2$ + 2x - 5$$, what is the derivative $$f'(x)$$?

Accepted Answer

$$f'(x) = 6x + 2$$

Question 3

A population of bacteria grows according to the function $$P(t) = 500e$$^{0.2t}$$. What is the instantaneous rate of growth at t = 5$ hours?

Accepted Answer

$$P'(5) = 100e$$^{1}$$

Question 4

Which of the following is the correct definition of the derivative of a function $$f(x) at a $$point $$x=a$$?

Accepted Answer

$$f'(a) = \lim_{h 	o 0} \frac{f(a+h) - f(a)}{h}$$

Question 5

If $$f(x) = \ln(x)$$, what is $$f'(x)$$?

Accepted Answer

$$f'(x) = \frac{1}{x}$$

Question 6

A medication is metabolized in the body according to $$C(t) = 100e$$^{-0.3t}$$, where C$ is the concentration in mg/L and t$ is time in hours. What is the rate at which the concentration is changing at t = 2$ hours?

Accepted Answer

$$C'(2) = -30e$$^{-0.3 	imes 2}$$

Question 7

Which rule is used to find the derivative of the product of two functions $$f(x)$$ and $$g(x)$$?

Accepted Answer

Product Rule: $$[f(x)g(x)]' = f'(x)g(x) + f(x)g'(x)$$

Question 8

Suppose $$y = \sin(x). $$What is $$\frac{dy}{dx}$$?

Accepted Answer

$$\cos(x)$$

Question 9

Which of the following best describes the Fundamental Theorem of Calculus?

Accepted Answer

It states that differentiation and integration are inverse processes.

Question 10

Evaluate the definite integral $$\$$int_0$$^2 (4x - 1) dx.$$

Accepted Answer

$$6$$

Question 11

A biologist models the growth of a plant with $$h(t) = 2t^3$ - 5t^2$ + 4t$$, where $$h is $$height in cm and $$t is $$time in weeks. What is the rate of growth at $$t = 3$$ weeks?

Accepted Answer

$$h'(3) = 54 - 30 + 4 = 28$$

Question 12

Which of the following is the correct derivative of $$f(x) = e$$^{2x}$$?

Accepted Answer

$$f'(x) = 2e$$^{2x}$$

Question 13

If $$f(x) = x^4$ - 2x^2$ + 7$$, what is $$f''(x)$$, the second derivative?

Accepted Answer

$$f''(x) = 12x^2$ - 4$$

Question 14

Which of the following functions is continuous everywhere?

Accepted Answer

$$f(x) = \sin(x)$$

Question 15

A chemical reaction rate is given by $$R(t) = 5t^2$e^{-t}. $$What is $$R'(t)$ using the product rule?

Accepted Answer

$$R'(t) = 10te$$^{-t}$$ - 5t^2$e^{-t}$

Question 16

Which of the following is the correct antiderivative of $$f(x) = 3x^2$?

Accepted Answer

$$F(x) = x^3$ + C$$

Question 17

If $$f(x) = \cos(x)$$, what is $$\int f(x) dx$$?

Accepted Answer

$$\sin(x) + C$$

Question 18

Which of the following best describes a critical point of a function $$f(x)$$?

Accepted Answer

A point where $$f'(x) = 0 or$$ $$f'(x)$$ does not exist.

Question 19

A researcher models the spread of a disease with $$N(t) = 1000/(1 + 5e$$^{-0.4t}$$). $$What is the initial number of infected individuals at $$t = 0$$?

Accepted Answer

$$N(0) = 1000/(1 + 5)$$

Business Calculus: Calculus for Life Sciences I – Syllabus and Core Concepts

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