Question

Landons front lawn measures 20 feet by 8 feet he counts to find that there are 120 blades of grass per square inch how many blade do grass are in the entire lawn use proportions

Answer 1

First step is to convert feet into inches:
1 foot = 12 inches
20feet = 20*12=240 inches
8feet = 8*12=96 inches

Now we can calculate total area:
A = height * width
A= 240 * 96
A=23040 inches²

We know the amount per one inch² and we need to find out total number of blades:

1 inch² 120 blades
23040 inches² x blades

Now we cross-multiply numbers:
1*x = 23040 * 120
x= 2764800

There are total of 2764800 blades in the entire lawn