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May 22, 2015

Homework Help: Math

Posted by Jessica on Tuesday, April 19, 2011 at 4:48pm.

A plumber charges $45 for a service call, plus $70/h for her time.

a. Find the cost of a two hour service call.

b. How long was a services call that cost $150?


Also .......

as the weight held by a spring increases, the length of the spring increase proportionally. suppose a 2-lb weight stretches a spring to 15 in., and a 12-lb weight stretches the same spring to 20 in. what is the length of the spring with no weight attached?

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