Estimate by rounding as indicated.There are 27,878,400 square feet in one square mile. How many square feet are there in 82 square miles? Estimate by rounding the number of square feet in one square mile to the nearest ten million and the number of square miles to the nearest ten. Also find the exact answer.
A. Estimate: 2,240,000,000 sq ft; exact: 2,285,996,000 sq ft
B. Estimate: 2,400,000,000 sq ft; exact: 2,285,996,000 sq ft
C. Estimate: 2,240,000,000 sq ft; exact: 2,286,028,800 sq ft
D. Estimate: 2,400,000,000 sq ft; exact: 2,286,028,800 sq ft
Answer: D
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