An outdoor swimming pool costs 8 dollars per day to visit during the summer. there is also a 25 dollar yearly registration fee. is the total cost proportional to the number of days visited

Could somebody me with this radical simplification?

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

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?