Use the five steps for problem solving to answer the following question. Please show all of your work.

The volume of a rectangular slab of concrete needs to exceed 72 cu. ft. If the length is 12 feet and the width is 8 feet, how thick does the concrete slab need to be?

Solution:

The thickness : x

The equation is

The volume = 12*8*x >72

96x >72

x> 0.75

So

the thickness should exceed 0.75 ft