Answer:
D
Step-by-step explanation:
It would be a cone with a radius of 4 units rotating around y-axis.
Answer:
No. They are not equivalent.
Step-by-step explanation:

=> 
Therefore, 3/5 and 1/2 are not equivalent.
Hoped this helped.
Answer:
<h2>
A. Zero, because the discriminant is negative. </h2>
Step-by-step explanation:
I just did it.
Answer:
D. 80
Step-by-step explanation:
We have the following function :
(I)
Where
is the monthly fee for after - school care and preschool.
Where
represents the number of hours spent in after - school care.
We know that the total monthly bill for one child was $750 ⇒

Using (I) we will find the value of the hours ''
'' that verifies the expression ⇒
⇒

We find that the value of the hours ''
'' is 80 hours.
The total number of hours the child spent in after - school care is D. 80