Answer:
8. D 269.6
9. A 20 +10h
Step-by-step explanation:
8. The large rectangle is 4+6.4+4+6.4 = 20.8 width and 10.5 length. The area is
A = l*w = 20.8* 10.5 =218.4
The top rectangle is 6.4 width and length is 4
A = l*w =6.4*4 =25.6
The same is true for the rectangle on the bottom.
Add the three rectangles together to get the total surface area
218.4+25.6+25.6 =269.6
9. The plant is 20 inches tall
It grows 2h inches a week for 4 weeks
20 +2h*4
20 +8h
It grows h inches a week after 4 weeks
At 6 weeks, that is 2 weeks of growth
The growth is h *2
Add that to the previous total
20 +8h +2h
20 +10h
