If there's a variable and an exponent which do i do first

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents