Answer:
c.
40.32%
Step-by-step explanation:
correct on edge
c
edg 20/21
158 square feet
2(lb+bh+lh)
2(40+24+15)
80+ 48+30
158
CSA =220sq.cm
x=1
5x-4=9
5x=9-4
5x=5
x=5