A plane is at an altitude of 29,061 2/3 feet above ground level. After 30 minutes, the plane rises by an altitude of 6,627 3/8 feet. Which of the following is true about the altitude of the plane after 30 minutes?

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

answer for #1 is c

answer for #2 is d

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