9. D is 20 + h
But help :)

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

6e14 is the answer.