Answer:
C(t) = 50 + 75t
Step-by-step explanation:
The electrician charges a set fee of $50. This fee is independent on the number of hours he spends in each house.
He charges an additional $75 per hour.
If the number of hours he spends working in each house is t, then, after t hours, the additional charges will be:
75 * t = 75t
The total cost, C(t) of the electrician's services is the sum of the set fee and the additional charges after t hours. That is:
C(t) = 50 + 75t
This is the function C(t), representing the total cost of the electrician's services.
