Help please and thatn you plz ill give more points

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

Піf x = y and y= z, which statement must be true? оа. -x = -2 b. x= z ос. —x = 2 od. 2= x

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.