Question

the average U.S farm occupies 435 acres. how many square miles is this?( 1 acre = 43,560 ft^2; 1 mi = 5280 ft)

Answer 1

Let's make the convertion from acre to squared ft:

$435\text{ acre(}\frac{43560\text{ sq ft}}{1\text{ acre}})=18948600\text{ sq ft}$

Now, lets convert this to squared miles:

$18948600\text{ sq ft(}\frac{1\text{ mi}}{5280\text{ ft}})\text{(}\frac{1\text{ mi}}{5280\text{ ft}})=0.6796875$

Therefore 435 acres is 0.6796875 squared miles.