After four test trudy's average score was 85. if her score is 90 on the fifth test, what will be her average for all five tests?

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