Answer:

Step-by-step explanation:
Gradient



Equation of a line

- Sub one set of points into equation

The sand makes up a rectangular prism of dimensions 8' by 10' by 0.5'.
The volume of sand is then V = L*W*H, or V = (10')(8')(0.5') = 40 cubic ft.
Use Photomath it would tell you the answer if you take a pic of your question