The area of a square can be calculated by using this formula:
[tex]A=s^2[/tex]
Where "s" is the length of a side of the square.
In this case, you can identify that:
[tex]s=9.7ft[/tex]
Then, in order to estimate the area of the square, you can follow these steps:
1. Round the length "s" to the nearest whole number. Since the first digit after the Decimal point is 7 and:
[tex]7>5[/tex]
You must round up:
[tex]s\approx10ft[/tex]
2. Knowing that:
[tex]10^2=10\cdot10[/tex]
You can determine that:
[tex]A\approx100ft^2[/tex]
Hence, the answer is: Option C.
