After 30 yaers earning 5% interest compounded annually the balance of a saving account is 45,880 what was the original deposit in the account to the nearest hundred dollars

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work