How to do question 15, 16 17 (for question 17 explain ! )

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.