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9. D is 20 + h
But help :)

9. D is 20 + h But help :)-example-1
User TTar
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1 Answer

3 votes

Answer:

8. D 269.6

9. A 20 +10h

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

User Ali Heikal
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