If a copier makes 3 copies every 4 seconds, then continues at this rate, how many minutes will it take to make 9,000 copies? Answers.
A) 60	B) 100	C) 120	D) 200	E) 3,000
Let x = seconds to make 9000 copies.   We get: 3/4 = 9000/x   Cross multiply to get: 3x = (4)(9000)   Simplify: 3x = 36,000   Solve: x = 12,000 SECONDS   There are 60 seconds in a minute.   12,000/60 = 200   So, it takes 200 MINUTES to make 9000 copies   Answer: 200
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If a copier makes 3 copies every 4 seconds, then continues at this rate, how many minutes will it take to make 9,000 copies?