A square field has an area of 479 ft2. What is the approximate length of a side of the field? Give your answer to the nearest foot.
A. 240
B. 23
C. 22
D. 21
Yes, it's c
To find the length of a side of the square field, you can take the square root of its area. The square root of 479 is approximately 21.9.
Now, to give your answer to the nearest foot, you need to round this value to the nearest whole number since the length of a side cannot be expressed in decimals.
When rounding decimals, if the decimal part is less than 0.5, you round down to the nearest whole number. If it is 0.5 or greater, you round up to the nearest whole number.
In this case, the decimal part of 21.9 is less than 0.5, so you round down to 21.
Therefore, the approximate length of a side of the field is 21 feet.
The correct answer is D. 21.
21^2 = 441
22^2 = 484
23^2 = 529
What is the square root of 479?
A = LW