Juan insists that if the length of the radius of a cylinder doubles, the volume will double. Sandy thinks the volume will

be more than double. Who is correct? Explain your reasoning.

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?