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No integer squared is equal to 849, but the square root of 849 is 29.138 (5sf)
28 is not a perfect square. A perfect square is an integer that is the square of another integer. 9 is a perfect square; it equal to 3 squared, or 3 X 3. Often, such numbers are called simply square numbers. While 28 is not a perfect square, it is a square number in the sense that it has a square root. by definition, the square root of 28 times itself equals 28.
It is 2.
9
It is: 1.4 times 5 equals 7