there one on the bottom That says "D. 5 bags" if you can't see it

We have to find the area of the triangle
[tex]A=\frac{bh}{2}[/tex]Where b = 20 and h = 6.
[tex]A=\frac{20\cdot6}{2}=60m^2[/tex]If one bag covers 20 square meters, then Betsy needs 3 bags to cover it all.