If loga(7)=4, what is the value of a^4

What value of x will make the triangles similar by the sss similarity theorem?

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.

(60 points) explain this in detail