at a batting cage, each set of baseballs the machine pitches cost $2.50. which inequality represents n, the number of sets of the baseballs the machine will pitch for no more than $15.00?

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