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➷ 1) The formula for volume of a sphere is:

r is the radius
To find the volume, you would just substitute the radius into that formula to get the volume
2) The formula for volume of a cone is:

Again, just substitute the radius in and solve.
3) The radius is half of the diameter so you would just divide the diameter by 2.
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➶ Hope This Helps You!
➶ Good Luck (:
➶ Have A Great Day ^-^
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