Question

question/

Total U.S. farmland occupies 954 million acres. How many square miles is this? (l acre 43,560 ft2, I mile 5280 ft).

Total U.S. land area is 3.537 million square miles. What per-centage Of U.S. land is farmland?

I post this question in Chegg but they give me wrong answer , please I want write answer with detales and explaination

Answer 1

answer : 1490622 sq mi

1 acre = 43,560 ft2

1mile = 5280 ft.

Total U.S. farmland occupies = 954 million acres

                                               = 954 x 10^6 acres

                                                = 954 x 10^6 x 43,560 ft2

                                                = 4.16 x 10^13 ft^2

                                                = 4.16 x 10^13 x 3.587 x 10^-8 mi^2

                                                = 1490622 square miles

Total U.S. land area = 3.537 million square miles

                                 = 3.537 x 10^6 square miles.

total U.S farm land = 1.490622 x 10^6 square miles.

percentage of U.S farm land = (1.490622 x 10^6 / 3.537 x 10^6 ) x 100

                                               = 42 %