What’s the correct answer for 9?

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.

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?