anonymous
  • anonymous
Evan is landscaping his backyard. The yard is shaped like a rectangle and measures 80 feet by 70 feet. He wants to spread topsoil evenly over the entire surface. One load of topsoil will cover 400 square feet, 4 inches deep. How many loads of dirt does Evan need in order to cover his entire yard?
Mathematics
chestercat
  • chestercat
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Mertsj
  • Mertsj
What is the area of the yard?
Mertsj
  • Mertsj
arr???
Mertsj
  • Mertsj
Are you sure about that wolfe?

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mathmate
  • mathmate
@wolfe "subtract"?
anonymous
  • anonymous
if i do BxH i get 5600 so then subtract the 400 and get 5200!
Mertsj
  • Mertsj
You need to cover 5600 square feet. Each load covers 400 square feet. divide 5600 by 400 to see how many loads are needed.
anonymous
  • anonymous
but my answer options are 14 16 18 20 ??
Mertsj
  • Mertsj
Choose the first one.
anonymous
  • anonymous
thanks!
mathmate
  • mathmate
@wolfe you're right, we can divide by repeatedly subtract, but that's reserved for grade school where they have not yet learned division.

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