Pls help me with this

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.

Which number produces a rationale number when multiplied by 1/5

[15 points, algebra 2]simplify the complex fraction and find the restrictions.