You are ordering planks of wood that are 8' long each.
You need 15 pieces cut 3' long,
and 9 pieces cut 4' long. How
many planks of wood should
you order?

you need 10 8' planks of wood because 15x3= 45+9x4= 77, then 77÷8= 9.625, but you can't get .625 of a plank, so 10. hope you get a good grade!

Step-by-step explanation:

A three dimensional configuration with its face shaped of rectangle is called a Cuboid. So, the prism is in the shape of a cuboid.

The volume of a cuboid = Length *Breadth*Height

The volume of the cuboid shaped prism is