Any positive number has two square roots, a positive square root and a negative square root. In this instance, the square root of 4900 is equal to ±70 (that is, 70 and –70).
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Such a number does not exist. 3600 is 60 squared and 4900 is 70 squared There is no number between 60 and 70 that is a multiple of 15 so there can be no square between 3600 and 4900 that is a multiple of 15.
Area of the circle: pi*70 squared = 4900*pi square feet
It is: 4900
The square roots of 4900 are 70 and -70.
The square root of 4900 is 70