Solve the problem.A retailer knows that n games can be sold in a month if the price is 
dollars per game. If he buys each game for $1, and if he wishes to make a profit of at least 
per month on sales of this game, how many games must he sell each month?
A. 20 ? n ? 30
B. 20 ? n ? 35
C. 30 ? n ? 70
D. 30 ? n ? 40
Answer: D
Mathematics
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Calculate the area of the surface S.S is the portion of the plane 8x + 3y + 2z = 4 that lies within the cylinder 
.
A. 
?
B. 
C. 25
?
D. 
?
Mathematics
Solve the problem. Round your answer, if appropriate.The volume of a rectangular box with a square base remains constant at 900 cm3 as the area of the base increases at a rate of 2 
2/sec. Find the rate at which the height of the box is decreasing when each side of the base is 12 cm long. (Do not round your answer.)
A. 
cm/sec
B. 
cm/sec
C. 
cm/sec
D. 
cm/sec
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Solve the equation.-75 = 5q
A. -15 B. 80 C. 1 D. -80
Mathematics
Evaluate the function.Given that f(x) = 
, find f(r - 3).
A. 
B. 
C. 
D. 
Mathematics