Kelly can work for her dad and make $6 per hour, or she can work for Jana's Mowing Service and make $14 per hour. If she needs to make at least $84, and can only work 10 hours total. She can work for Jana's Mowing Service for at most 5 hours.

Taber invested money in an account where interest is compounded every year. he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?