Differentiate.f(x) = (4x3 + 6)(2x7 - 7)
A. f'(x) = 80x9 + 84x6 - 84x
B. f'(x) = 16x9 + 84x6 - 84x
C. f'(x) = 80x9 + 84x6 - 84x2
D. f'(x) = 16x9 + 84x6 - 84x2
Answer: C
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The following table shows the amount remaining, in grams, of a radioactive substance after t years.
05101520
500429.37368.71316.63271.9?
A. Calculate the average rate of change in amount of radioactive substance from 
to 
. (Be sure to get the sign right.)B. Explain in practical terms the meaning of the number you calculated in part A.C. Use your answer from part A to estimate the amount remaining after 13 years.D. What is the limiting value of amount remaining of this (or any other) radioactive substance?
What will be an ideal response?
Express the number in terms of j.-
A. 
B. - 
C. 
D. - 
Solve the given differential equation.e3x - 3ydx - dy = 0
A. y = ln (e3x + C)
B. y = 3e3x + C
C. y = 3ln (e3x + C)
D. y = 
ln (e3x + C)
Add mentally.7 + 0 + 3 + 2 + 5 + 0 + 6
A. 22 B. 24 C. 23 D. 25