Again sorry for too much but i need to past this

What is the size of the matrix resulting from

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.

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with