Question

An electrician charges​ $50 for a service call plus​ $15 per hour. The cost function for the​ electrician's charge is f(x) = $50 + 15x where x is the number of hours for the call. Determine the cost of a four hour service call

Answer 1

$110 for a 4-hour call

Explanation:

`f(x)=50+15x\\f(4)=50+15(4)=50+60=110`