The base and height in a figure are always what?

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

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

Which expression is a perfect cube? a. x8 b. y24 c. m28 d. x64