Give your answer as a rate, accurate to five decimal places. What loss would offset a 13% gain?

Your uncle gives you a check for $8,888 on your 8th birthday. You want to buy a $10,000 car when you turn 18, so you put it in the bank and let it grow until then. If the bank compounds interest weekly, what annual interest rate would you need to meet your goal? Set up the equation and show every step of the work. Give your answer as a percentage rounded to two decimal places.

Dolores wants to save $70 a month in an account which pays 6% interest compounded monthly. If they save the same amount every month for 13 years, how much money will they have at the end?  Give your answer to two decimal places.

If you invest $900 at 4% per year, simple interest, how much will your investment be worth after 9 years?  Round your answer to two decimal places if rounding is necessary.