Solve.An auto repair shop charged a customer $330 to repair a car. The bill listed $90 for parts and the remainder for labor. If the cost of labor is $40 per hour, how many hours of labor did it take to repair the car?

A. 7 hr
B. 5 hr
C. 6 hr
D. 6.5 hr


Answer: C

Mathematics

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A.

B.

C.

D.

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