Find the derivative.y = 4ex2
A. 8xex2
B. 8xe4x2
C. 8xe2x
D. 8xe
Answer: A
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Evaluate the factorial expression.3!
A. 12 B. 3 C. 2 D. 6
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sec ? = - 
, 
< ? < ?Find sin 
.
A. 
B. 
C. - 
D. - 
Graph the function.y = 2 sin (2x + ?)
A. 
B. 
C. 
D. 
Solve the problem.A person has hired an investment broker to buy stock. The broker has three different stock funds that are of interest, but each is sensitive to a certain economic indicator that is impossible to predict. The indicator will be positive, neutral, or negative. The table below shows the payoffs in thousands of dollars. Find the strategy that the broker should recommend to maximize the expected value of the investment. 
A. Invest in Stock A with probability 0, invest in Stock B with probability 1, and invest in Stock C with probability 0. B. Invest in Stock A with probability 1, invest in Stock B with probability 0, and invest in Stock C with probability 0. C. Invest in Stock A with probability 1/3, invest in Stock B with probability 1/3, and invest in Stock C with probability 1/3. D. Invest in Stock A with probability 5/13, invest in Stock B with probability 0, and invest in Stock C with probability 8/13.