Suppose that a4 = 0. prove that (i – a-1 = i + a+ a2 + a3. then, state an extension of this result where a = 0 for some positive integer k. hint: compute (i - a)(i + a + a2 + a3).

Suppose a ball is dropped fromca height of 6ft. it bounces back up but time it bounces, it reaches only 7/10 of its pervious height. what is the total of each height that the ball reaches after 5 bounces

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.