A grain silo is shown below:

Grain silo formed by cylinder with radius 6 feet and height 168 feet and a half sphere on the top

What is the volume of grain that could completely fill this silo, rounded to the nearest whole number? Use 22 over 7 for pi.

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Find the volume of the bottom and top separately and then add them.

Cylinder volume is the area of the bottom times the height

(22/7)(5^2)•175=13750 ft^3

The volume of a sphere is

V=(4/3)(22/7)r^3

where r is the radius. Here that's also 5 since it fits on the cylinder.

Also we only want half the sphere so use

V=(2/3)(22/7)•5^3=261.9 ft^3

Which we round upto 262.

Now add the parts together

13750+262=14,012 ft^3

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

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step-by-step explanation:

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