most people think of the size of a house lot in feet. find the number of square feet in four acres. explain how you arrived at your answer.
2006-12-24 06:38:04 · 9 answers · asked by pretty j 1 in Science & Mathematics ➔ Mathematics
4/640 square miles., which is equal to 1/160 square miles.
2006-12-24 06:45:28 · answer #1 · answered by so far north 3 · 0⤊ 0⤋
1) It is 1/160-th of a square mile.
2) 174,240 square feet
The first part is a simple ratio of 4 acres to 640 acres or the fraction 4/640 which reduces to 1/160.
The second part, working just from the information presented and knowing a mile is 5,280 feet, is: 1 square mile = 1 mile * 1 mile = (1 mi * 5280 ft/mi) * (1 mi * 5280 ft/mi) = 5280^2 ft^2. Since we already know 4 acres is 1/160 of a square mile: (5280 * 5280) / 160 ft^2 which equals 174,240 square feet.
2006-12-24 06:50:59 · answer #2 · answered by roynburton 5 · 0⤊ 0⤋
The answer to your question is 4/640 = 1/160 of a square mile.
The number of square feet in four acres is 43,560 (the number of square feet in 1 acres) * 4 = 174,240 square feet.
2006-12-24 06:48:04 · answer #3 · answered by beached42 4 · 0⤊ 0⤋
640 acres=1 square mile
(4/640)(640) acres = 4/640 square miles
4 acres = 1/160 = 1/160 of a square mile
4 acres is 0.625% % of a square mile
2006-12-24 06:46:03 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
Use unit analysis,
portion = 4/640
(4 acres) = (4 acres)(43,560 ft^2/1 acre) = 174,240 ft^2
2006-12-24 06:47:38 · answer #5 · answered by sahsjing 7 · 0⤊ 0⤋
1 acre=1/640 mi^2
4 acres=1/160 mi^2
1mi^2=5280^2=27,878,400ft^2
1/160 mi^2=27878400/160=174,240ft^2
2006-12-24 08:45:10 · answer #6 · answered by mu_do_in 3 · 0⤊ 0⤋
1 acre = 43,560 sq ft
therefore
4 X 43560 = 174,240 sq ft.
2006-12-24 06:48:36 · answer #7 · answered by Sun and Sand 3 · 0⤊ 0⤋
divide 4 by 640
4/640 = 1 / 160 0r
0.00625 =
0.625%
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2006-12-24 07:29:09 · answer #8 · answered by SAMUEL D 7 · 0⤊ 0⤋
1/160 or about 0.6%
2006-12-24 06:45:48 · answer #9 · answered by questor_2001 3 · 0⤊ 0⤋