Solve the problem.The price p and the quantity x sold of a certain product obey the demand equation p = - 
x + 120, 0 ? x ? 480.What price should the company charge to maximize revenue?
A. $72
B. $90
C. $30
D. $60
Answer: D
Mathematics
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Evaluate the integral.
x dx
A. x cos-1x + 
+ C
B. x cos-1x - 
+ C
C. x cos-1x - 
+ C
D. x cos-1x - 2
+ C
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Find an expression equivalent to the given expression.
sinh u, where u is a function of x
A. cosh u
B. sinh u 
C. cosh u 
D. -cosh u 
Mathematics
Solve the problem.Jonathan estimated his GPA would be 2.81. When grades came out, he saw that his GPA was 2.74. Did he receive better grades than his estimate or worse?
A. Better B. Worse
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Make a stem and leaf plot of the data.The following data show the number of laps runby each participant in a marathon.46 65 55 43 51 4857 30 43 49 32 56
A. 
B. 
Mathematics