must have function that is decreasing over a given interval always be negative over that same interval explain

Umm.. just started this 2day and its not on my notes(p′︵‵。)

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! 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