Homework: Ch. 13.4 & 13.5 Question 12, 13.5.9 Applications Part 2 of 2 points O Points: 0 of 1 Save On a weekend outing, Manuel rents a motorboat for 6 hours to travel down the If the river current flows at a speed of 4 mph, how fast must Manuel travel river and back. The rental operator tells him to go for 2 hours downstream, in order to return in 6 hours? leaving 4 hours to return upstream. 12 mph (Simplify your answer.) How far downstream did Manuel go before he turned back? mi (Simplify your answer.)