Meg started her trip with 11 1/2 gallons of gas in her car's gas tank. she bought an additional 6 4/5 gallons on her trip and arrived back home with 3 3/10 gallons left. how much gas did she use on the trip?

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?