Please help!! I have until today this question has four parts so let me know if you need the rest

Part 1: 359188.76

Step-by-step explanation:

Main tank has a radius of 70 ft.

The volume of a complete sphere with a radius r = (4/3)pi r^3

= 1436755.04 cu.ft

If the main tank has the shape of a quarter sphere, we divide the volume by 4.

Volume of tank = 1436755.04/4 = 359188.76 cu. ft.

If you wish, post the remaining parts, please.

Step-by-step explanation:

We khow that the radius is 70 feet .

We want to khow what is the area of quarter-sphere

we khow that the area of a sphere is 4π*r² where r is the radius

so all we should do is dividing this expression by 4

So the area is approximatively 15394 sq.ft