Let x = red
Let 0.5x = green
Let (x) + (0.5x) = 1.5x = blue
Let 0.5(1.5x) = 0.75x = yellow
Let 0.75x + 4 = brown





Use this value to calculate the other required numbers.
red = 28
green = 0.5x = 0.5(28) = 14
blue = 1.5x = 1.5(28) = 42
yellow = 0.75x = 0.75(28) = 21
brown = 0.75x + 4 = 0.75(28) + 4 = 25
It's a parabolic curve, so quadratic is best
A = (1/2)*b*h = (1/2)*8*10 = 40 . . . . units^2
I would have to go with B as your answer
There are (150 and 3/10) tenths in 15.03 .