30 POINTS! REALLY SIMPLE PLEASE HURRY

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?