Find the volume of a cylinder whose base has a diameter of 11 and whose height is 12.5. use 3.14 and round your answer to the nearest tenth plzz

Ineed in figuring out this problem.

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?