Determine the period of the function.Period of y = -5 cos (8?x + 4?)
A. 
B. 4
C. 8?
D. 
Answer: A
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The bar graph below shows the number of students by major in the College of Arts and Sciences. Answer the question.
Did twice as many students major in English as in Math?
A. No B. Yes
Find the function value.Let f(x) = 3(1 - x). Find f(3).
A. 9
B. 
C. -6
D. 
Solve the problem.The function A = A0e-0.01155x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 500 pounds of the material are placed in the vault, how much time will need to pass for only 140 pounds to remain?
A. 220 years B. 120 years C. 110 years D. 115 years
Find the partial derivative.Let z = f(x,y) = 9x2 - 11xy + 4y3. Find 
.
A. 18x - 11y B. 18x + 11y2 C. -11x - 12y D. -11x + 12y2