Find Dxy.y = sinh-1 (cos x)
A. - 
B. - 
C. 
D. - sin x
Answer: A
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Multiply or divide. Simplify, if possible. Assume all variables and radicands represent nonnegative real numbers.
A. 2
B. 
C. 5
D. 5
Find the surface area of a rectangular box with length L, width W, and height H.L = 13.4 m, W = 14.5 m, H = 21.6 m
A. 1404 m2 B. 1281 m2 C. 797 m2 D. 1594 m2
Solve the problem.An experiment in a wind tunnel generates cyclic waves. The following data is collected for 60 seconds: 
Let V represent the wind speed (velocity) in feet per second and let t represent the time in seconds. Write a sine equation that describes the wave.
A. V = 25 sin 
+ 50
B. V = 75 sin(60t - 30) + 25
C. V = 50 sin (60t - 30) + 25
D. V = 75 sin 
+ 25
Solve the problem.A company finds that when it spends x million dollars on advertising, its profit P, in thousands of dollars, is given by 
Currently the company spends 8 million dollars on advertising. Use the marginal profit to estimate the change in profit if the company increases its advertising expenditure by one million dollars.
A. 790 thousand dollars B. 216 thousand dollars C. 280 thousand dollars D. -29 thousand dollars