Normally, a balloon like mine is fueled using 2 tanks that each
hold 10 gallons of gas. however, i do not have such big tanks.
my tanks can only hold 3/7 of that amount. how many tanks
do i need to fill in order to get the required 20 gallons of gas?

Brittany has designed four different birdcages, each with the same volume: a square pyramid, a cylinder, a cone, and a sphere. the zoo wants to use one of brittany’s designs but plans to change the volume of the cage. find the design change that would result in the birdcage with the greatest volume. a.) increase the area of the base of the square pyramid by a factor of ten. b.) increase the height of the cylinder by a factor of ten. c.) increase the radius of the cone by a factor of ten. d.) increase the radius of a sphere by a factor of ten.

Ineed the answers for this one as well!

Ireally don't understand this, i'm really an idiot but i want to know how to figure this out. !