This is a quiz and I need help

Acylinder has volume 45π and radius 3. what is it’s height?

Find the maximum value of p= 4x + 5y subject to the following constraints :

Aflagpole broke in a storm. it was originally 8 1 81 feet tall. 2 8 28 feet are still sticking straight out of the ground, where it snapped, but the remaining piece has hinged over and touches the ground some distance away. how far away is the end of the pole from the base of the pole along the ground?