Answer:
D. 80
Step-by-step explanation:
We have the following function :
[tex]f(h)=350+5h[/tex] (I)
Where [tex]f(h)[/tex] is the monthly fee for after - school care and preschool.
Where [tex]h[/tex] represents the number of hours spent in after - school care.
We know that the total monthly bill for one child was $750 ⇒
[tex]f(h)=750[/tex]
Using (I) we will find the value of the hours ''[tex]h[/tex]'' that verifies the expression ⇒
[tex]f(h)=750=350+5h[/tex] ⇒
[tex]750=350+5h\\750-350=5h\\400=5h\\h=\frac{400}{5}=80[/tex]
We find that the value of the hours ''[tex]h[/tex]'' is 80 hours.
The total number of hours the child spent in after - school care is D. 80
