All the comic books in a store are the same price. vera buys 3 comic books for $7.50.
what is the price of 1 comic book? (find the unit rate)

$2.50

Step-by-step explanation:

7.50 / 3 = 2.50

each comic book is $2.50

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