Romero trained 15.5 hours in one particular week. He spent 3/4 of these hours running, while thr rest of the time he spent weight training. How many hours did Romero spend weight training that week.

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