anonymous
  • anonymous
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?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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mathstudent55
  • mathstudent55
You need to find the volume of the prism in cubic yards. Then multiply the volume by the unit cost of concrete.
mathstudent55
  • mathstudent55
Do you know the formula for the volume of a prism?
mathstudent55
  • mathstudent55
|dw:1443387238815:dw|

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anonymous
  • anonymous
so 450?
anonymous
  • anonymous
450x3?
mathstudent55
  • mathstudent55
Correct. 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
  • anonymous
1350?
anonymous
  • anonymous
so is that the answer?
mathstudent55
  • mathstudent55
Correct. Answer is $1350
anonymous
  • anonymous
Okay thanks wow I didn't realize how easy that was.
mathstudent55
  • mathstudent55
See, you're smarter than you think.
mathstudent55
  • mathstudent55
You're welcome.

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