Answer:
The customer's bill would be $120.00
Explanation:
A plumber charges for a service call = $45.00
He charges for each hour that he works at customer's house = $25.00
He conducts a service call that takes 3 hours, customer's bill would be
= 45 + ( 25 × 3 )
= 45 + 75
= $120.00
The customer's bill would be $120.00