SAT Mathematics Practice Test 3

It is given that 1 ounce of graphene covers 7 football fields.
Therefore, 48 ounces can cover$7\times 48=336$ football fields.
If each football field has an area of $1\frac{1}{3}$ acres, then 336 football fields have a total area of $36\times \frac{1}{3}=448$ acres.
Therefore, of the choices given, 450 acres is closest to the number of acres 48 ounces of graphene could cover.
Choice A is incorrect and may be the result of dividing, instead of multiplying, the number of football fields by $1\frac{1}{3}$.
Choice B is incorrect and may be the result of finding the number of football fields, not the number of acres, that can be covered by 48 ounces of graphene.
Choice D is incorrect and may be the result of setting up the expression $\frac{7\times 48\times 4}{4}$ and then finding only the numerator of the fraction.