Solve the problem.A CD store determines the following demand function for a particular CD 
where q = the number of CDs sold per day when the price per CD is x dollars. At what price is the revenue a maximum? Round your answer to the nearest dollar.
A. $16
B. $13
C. $20
D. $14
Answer: D
Mathematics
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Evaluate the expression without the use of a calculator, and then verify your answer using a calculator.ln e
A. e B. -1 C. 1 D. 0
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Find the acute angle between the lines.x - 
y = -2 and 
x - y = 7
A. 45° B. 75° C. 30° D. 60°
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Evaluate the expression.77764/5
A. 279,936 B. 1,679,616 C. 1296 D. 10,077,696
Mathematics
Graph the function.y = 
- 3
A. 
B. 
C. 
D. 
Mathematics