
now, for 13c
how much square feet will be covered? square feet means, Area,
namely, what is the area of that triangle?
well, now you know what sides "a" and "b" are,
area of a triangle is 1/2 b * h
The formula for the slope is 



Hope this helps.
頑張って!
Answer:
A. 29 units
Step-by-step explanation: