a rectangular prism measures 7 1/2cm by 12cm by 15 1/2cm calculate the number of cubes with edge length 1/2cm that fit in this prism. what is the volume of the prism in cm2 and explain your reasoning

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