A plumber charges $70 for the first thirty minutes of each house call plus $4 for each
Chapter 7, Problem 66(choose chapter or problem)
A plumber charges $70 for the first thirty minutes of each house call plus $4 for each additional minute that she works. The plumber charges Ke-Min $122 for her time. What amount of time, in minutes, did the plumber work? A 43 B 48 C 58 D 64
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