The radius of a circle is 5 in. Find its area to the nearest whole number.

1 answer

The area \( A \) of a circle can be calculated using the formula:

\[ A = \pi r^2 \]

where \( r \) is the radius of the circle. Given that the radius \( r \) is 5 inches, we can substitute this value into the formula:

\[ A = \pi (5)^2 = \pi \times 25 \]

Now, using the approximate value of \( \pi \) as 3.14:

\[ A \approx 3.14 \times 25 = 78.5 \]

Rounding this to the nearest whole number gives:

\[ A \approx 79 \]

Therefore, the area of the circle is approximately 79 square inches.