I ll mark you as the brainliest plz answer

The answer is c

Step-by-step explanation:

if you add the first 2 numbers squared out of the 3 on i and ii and divide the by the 3rd number on i and ii you get the last number which means you did it correctly. Demonstration

3,4,5 3×3=9 4×4=16 9+16=25 25÷5=5 that is the correct formula to answers thrs types of questions :)

final answer is : )

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