16x + 40y.....GCF is 8
8(2x + 5y) <==
Answer:
D
Step-by-step explanation:
<span>Find the area of two sides (Length*Height)*2 sidesFind the area of adjacent sides (Width*Height)*2 sidesFind the area of ends (Length*Width)*2 ends<span>Add the three areas together to find the surface area</span></span>