Note that 1 mile is 5280 ft. Multiply that value by 3 to obtain 15840 ft for 3 miles. Compare both given values, so 3 miles is bigger than 12320 ft.
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It will be bigger than if the radius were 20 mi and smaller than if it were 22 mi.
no
9 mi = 47,520 ft
1.2 mi = 6,336 ft
There are 5280 feet in 1 mile. So there are more than 5000 feet in 1 mi. Multiply all the numbers in that sentence by five: So there are more than 25000 feet in 5 mi.