Perform the indicated operations and explain .

We just started the introduction into circles and i have no idea how to do this.

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

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83