(1) in order to prepare a piece of groud for buliding a brick patio,a rectangle measuring 8 feet by 10 feet must be marked off.then the dirt within the rectangular must be dug out to a depth of 6 inches.finally,the resulting space must be filled with sand. (a) what is the volume of sand needed,in cubic feet,to fill the space? (b)sand costs $4 per cubic foot.what is the total cost of the sand needed to fill this space,including a $35 delivery charge?

Since you Length X Width X Depth, and you know 12 x 12 x 12 will give the number of cubic inches in a cubic foot, the rest can be figured.