Can you explain to me how i would solve this problem? can you explain/and show all the steps? also, is there anyway i can check my answer to see if it is correct? if so, explain to me? 22 = z + (-9)

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

What is the area of the shaded sector?