What percent is equal to 3/10  

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.

Icould really use some with this question.

If g^-1(x) is the inverse of g (x) which statement must be true