Question

a plumber chargers a base fee of $55 for a service call plus $55 per hour for each hour worked during the service call. use your equation to calculate how much money it will cost if the plumber works 4 hours

Answer 1

The plumber will charge $275

Explanation:

Models

Models are used to explain and predict the behavior of real objects or systems and are used in a variety of scientific disciplines.

The situation described in the question asks us to build a mathematical model for the charges for the service of a plumber.

The base fee is often called the fixed fee, which charged even if there is no service time. The plumber charges a base fee of $55.

The variable fee is that who changes for each hour worked. The plumber charges $55 per hour, so the charge for t hours of service is 55t.

The total charges of the plumber are modeled as:

C(t)=55t+55

If the plumber works t=4 hours, the cost will be:

C(4)=55*4+55=$275

The plumber will charge $275