Answer:
About $89.91
Step-by-step explanation:
The screening of compost creates a "cylinder" on top of the circular asparagus bed.
The volume of a cylinder is  [tex]\pi r^2 h[/tex]
Where r is the radius [6/2 = 3]
h is the "depth" [h=2]
Now, the volume is:
[tex]\pi r^2 h\\=\pi (3)^2 (2) \\=56.55[/tex]
We need 56.55 cubic feet, but it's not sold in fractional amount, so we will need 57 cubic feet of it.
Cost 1.59 per cubic feet, so we need
1.59 * 56.55 = $89.91
