405 is exactly 9 times the square root of five . The square root of 5 is irrational and can only be approximated with decimals.
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9 times the square root of 5
5sqrt(405) = 5sqrt(815) = 5sqrt(81)sqrt(5) = 59sqrt(5) = 45sqrt(5)
The area of Itapetim is 405 square kilometers.
Numismedia quotes a market value of $405 as of 04/2009
1 cubic yard = 27 cubic feet15 cubic yards = 405 cubic feetVolume = (L x W x D) = 405 cubic feetIf D = 1 foot, then (L x W) = 405 square feet