The frist three terms of a geometric sequence are as follows 80,40,20

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row