the yard has two parts, one is a little rectangle with size 15 ft x 20 ft, and the other is a big rectangle with sides 50 ft x 30 ft
The little rectangle has area
[tex]A_1=15ft\times20ft=300ft^2[/tex]
And the big rectangle's area is
[tex]A_2=50ft\times30ft=1500ft^2[/tex]
Then, the total area is
[tex]A=A_1+A_2=300+1500=1800ft^2[/tex]
And the number of pallets of sod Buzz needs is
[tex]\frac{1800ft^2}{400ft^2}=4.5[/tex]
So, Buzz needs 4.5 pallets of sod
