Answer:
.
Step-by-step explanation:
Let C represent total daily charges in dollars and t represent time in hours.
We have been given that a plumber charges $50 for a service call plus $80 per hour.
The amount charged for t hours would be
.
The total amount charged for t hours would be
.
We are also told that plumber spends no longer than 8 hours a day at any one site, this means that time t have a restriction as:

Therefore, our required cost function would be
.
Answer:

Step-by-step explanation:
hope this helps:)
I believe the answer is 9.
Answer:
Hi.
Step-by-step explanation:
Ask your teacher for help because your parents are paying the school fees. Feel free. If you want the answer still message back.