I’m stuck please help me

What is x3+3x2−16x−48 divided by x−1?

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?

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6