The number of measles cases increased 33.7% to 220 cases this year. What was the number of cases prior to the increase?

Hi there!

Multiply 33.7 with 0.01...

·

Then multiply 0.337 with the cases which is 220.

·

This means that 33.7% of 22 is 74.14 and this also means that the increased cases this year is 74.14.

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