1. It is parallel to the x-axis.
The aluminum section's area formula solved for h is 
From the complete question, the expression of the area (A) in terms of variables a, b and h is:

Factor out h from the expression on the right-hand side

Divide both sides of the equation by (a - b)

Remove the bracket

Rewrite the above equation as follows:

Hence, the aluminum section's area formula solved for h is 
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Answer:
1a) 0.03 = 3/100 = 3%
2b) 0.08 = 8/100 = 8%
3c) 0.4 = 4/100 =4%
4d) 3/90
5e) 4/90
Step-by-step explanation:
a, b, c we multiply the probability of each one green = 1/10 red = 3/10 blue = 4/10 yellow = 2/10
They are independant and they are replaced.
2a ) they are dependent as they are not replaced so before multiplying we see the total is reduced each turn. From 1/10 to 3/9 for green and red.
They mention independent as they stay independent per 2 picks.
Meaning red is dependant on green but yellow is not dependant on when we pick for red its only dependant for blue.
1 x 3 = 3 10x 9 = 90 = 3/90 green and red
2 x 4 = 8 10 x 9 = 90 = 4/90