Jessica started a stamp collection. She collected 118 stamps that had been printed between 1950 and 1980, 83 stamps that had been printed between 1900 and 1949, and 4 stamps that had been printed before 1900. She put all her stamps into albums. She filled the first album with 125 stamps. How many stamps did she need to put in another album?

She needs to put 80 stamps in another album

Step-by-step explanation:

Firstly, we need to calculate the total number of stamps collected.

That will be ;

118 + 83 + 4 = 205 stamps

Now, we are told that she put 125 in the first album, the number of stamps left to be put in another album will be;

205 - 125 = 80

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