7.

Find the area of a circle whose radius is 12 in. Round to the nearest tenth.

452.4 in2

113.1 in2

37.7 in2

75.4 in2

1 answer

To find the area of a circle, you can use the formula:

\[ \text{Area} = \pi r^2 \]

Here, \( r \) is the radius of the circle. Given the radius \( r \) is 12 inches, you can substitute this value into the formula:

\[ \text{Area} = \pi \times (12)^2 \]

\[ \text{Area} = \pi \times 144 \]

Using the approximate value for \(\pi \), which is 3.14159, we get:

\[ \text{Area} \approx 3.14159 \times 144 \]

\[ \text{Area} \approx 452.39 \]

When you round this to the nearest tenth, you get:

\[ \text{Area} \approx 452.4 \text{ in}^2 \]

Therefore, the area of the circle with a radius of 12 inches, rounded to the nearest tenth, is:

\[ 452.4 \text{ in}^2 \]
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