A student's cost for last semester at her community college was $2800. she spent $420 of that on books. what percent of last semester's college costs was spent on books?

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.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Ineed to know the answer to this algebra question.