Question

Auto Tech charged Mrs. Smith $90.00 for an automotive part plus $53.00 per hour

that a mechanic worked to install the part. The total charge was $328.50. For about how
long did the mechanic work to install the part on Mrs. Smith’s car?

Answer 1

4.5 hours

Explanation:

subtract the 90.00 from 328.50, ten you should get 238.50 which you'll divide by 53 and get 4.5 hours

Answer 2

The precise answer is 3.99588235. But you would round that to 4 hours.