Elijah is a running back on a football team. In the last game, he played for 4 3/4 minutes in the first half and 7 11/20 minutes in the second half. Find his total playing time.​

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters