If M is the set of all square numbers less than 80 and N is the set of all non-negative even numbers that are under 30, b find mUn and mNn

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.