Four hundred seventy-one of the one thousand contestants were girls. Girls made up what fraction of the contestants?

The fraction is 470/1000, which can be simplified to 47/100, and that is 47%.

Step-by-step explanation:

Basically you take what is asked for and you divide it by the total amount.

470 is the amount of girls as contestants.

1000 is the total amount of contestants.

And that gives you the ratio 470/1000.

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