Let f(t) be the solution to of y' = y2t - y, y(0) = 1. Which of the following statements is true?
A. f is decreasing at the origin.
B. f is increasing at the origin.
C. f(t) will be a constant solution of the differential equation.
D. f'(1) = 0
Answer: A
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Solve the problem.If the price charged for a candy bar is p(x) cents, then x thousand candy bars will be sold in a certain city, where 
How many candy bars must be sold to maximize revenue?
A. 780 candy bars B. 390 candy bars C. 390 thousand candy bars D. 780 thousand candy bars
Estimate 
of the function 
.
?
A. 
B. 
C. ?
D. 
E. 
Solve the problem.Students in a math class took a final exam. They took equivalent forms of the exam in monthly intervals thereafter. The average score S(t), in percent, after t months was found to be given by 
.Find S'(t).
A. S'(t) = - 
B. S'(t) = 74 - 
C. S'(t) = - 15 ln 
D. S'(t) = 
Add.
+ (- 
)
A. 0
B. 
C. 
D. - 