Answer:
The area which would be painted grey will be "47.7812 ft²".
Step-by-step explanation:
The given values are:
Radius of circle, r = 5.4 feet
Value of pi, π = 3.14
As we know,
Area of Semicircle = 
On putting the values in the above formula, we get
= 
= 
= 
=
The formula of a volume of sphere:

R - radius
We have R = 10. Substitute:

The range is {0, 2, 6, 7}.
Range is all the y-values.