How could you double the volume of the tent just by doubling just one of its dimensions?

What is the value of x? enter your answer in the box. photo attached.

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base