Solve the problem.A retailer knows that n games can be sold in a month at a price of 
dollars per game. Assume that he buys each game for 
and sells every one that he buys. 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. 25 ? n ? 35
B. 20 ? n ? 50
C. 20 ? n ? 70
D. 0 ? n ? 20
Answer: B
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Simplify the expression.53
A. -15 B. 125 C. 15 D. -125
Graph the set of points whose polar coordinates satisfy the given equation or inequality.0 ? ? ? 
, r = -4
A. 
B. 
C. 
D. 
Solve the problem.A chemical solution contains 2% calcium. How much calcium is in 
of solution? Round to the nearest hundredth if necessary.
A. 0.04 mL B. 100 mL C. 0.4 mL D. 10 mL
Solve the problem.After two years on the job, an engineer's salary was $40,000. After seven years on the job, her salary was $46,000. Let y represent her salary after x years on the job. Assuming that the change in her salary over time can be approximated by a straight line, give an equation for this line in the form y = mx + b.
A. y = 6000x + 40,000 B. y = 1200x + 37,600 C. y = 1200x + 40,000 D. y = 6000x + 28,000