Answer:
0.6
Explanation:
Area of a football field (a rectangle) is 120 x 53 = 6360 square yards.
A rate of 300 “football fields” per hour is 300 x 6360 square yards = 1.9 x 10^6 square yards.
Now we can determine how many square miles of rainforest are being cut every hour:
1.9 x 10^6 : 3.1 x 10^6 = 0.615 square miles
Round to the tenths place: 0.6 square miles.