Need help please with the step by step explanation

Three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder ( ! : ”0 )

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?