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anonymous
 one year ago
A concrete foundation for a building has the shape of a rectangular prism. The foundation is 15yards long, 10 yards wide, and 3 yards high. If concrete costs $3 per cubic yard, how much did the concrete cost for the foundation?
anonymous
 one year ago
A concrete foundation for a building has the shape of a rectangular prism. The foundation is 15yards long, 10 yards wide, and 3 yards high. If concrete costs $3 per cubic yard, how much did the concrete cost for the foundation?

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mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1You need to find the volume of the prism in cubic yards. Then multiply the volume by the unit cost of concrete.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Do you know the formula for the volume of a prism?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443387238815:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct. The volume is 450 cu yd. Now multiply 450 cu yd by $3/(cu yd). The cu yd units cancel out and you get an answer is dollars. What is 450 * 3 ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so is that the answer?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct. Answer is $1350

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay thanks wow I didn't realize how easy that was.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1See, you're smarter than you think.
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