Question

The radius of a circle is 3 m. Find its area to the nearest tenth.

Answer 1

Answer:

28.3 square meters.

Step-by-step explanation:

So we know that the radius of the circle is 3 meters. With that, we can figure out the area of the circle.

The area of a circle is given by the formula:

$A=\pi r^2$

Plug in 3 for r:

$A=\pi (3)^2$

Square the number:

$A=9\pi$

Use a calculator. Approximate:

$A\approx28.2743\approx28.3$

Therefore, the area of the circle is approximately 28.3 square meters.

Answer 2

Answer:

28.3 m²

Step-by-step explanation:

The area of a circle can be found using the following formula.

$a=\pi r^2$

We know the radius of the circle is 3 meters. We can substitute 3 m in for the variable, r.

$a= \pi (3m)^2$

Evaluate the exponent.

(3m)² = 3m * 3m= 9 m²

$a= \pi (9 m^2)$

Multiply pi and 9 meters squared.

9 m² * π = 28.2743339 m²

$a=28.2743339 m^2$

Round to the nearest tenth. The 7 in the hundredth place tells us to round the 2 in the tenth place to an 3

$a\approx 28.3 m^2$.

The area is approximately 28.3 square meters.