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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