Your kind help with these questions would be greatly appreciated, thank you.

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

Evaluate the expression. (9 + 5)(3 + 2)0

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex