a1 plumbing service charges $35 per hour plus a $25 travel charge for a service call

Question

how many hours would the service have a1 plumping to be the best deal

 

Answer 1

Your cost is:

C(h) = 35h + 25

 

From this equation you can find the cost for

h hours of service.

 

As for how many hours is the best deal...

Compared to what?  The longer they are

there, the more it costs. The best deal is not

to have to call them at all.