Jenny charges $9.15 an hour to babysit toddlers and $7.45 an hour to babysit school-aged children, if jenny babysat toddlers for 9 hours and school-aged children for 6 hours, how much money did she earn in all?

toddlers: 9.15 x 9 = 82.35

school-aged: 7.45 x 6 = 44.70

then you just add 82.35 and 44.70 which gets you a total of $127.05

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