Find the area of a circle with a diameter of 40 cm. Use 3.14 for π
and express your answer to the tenths place. Use the formula sheet provided. (1 point)
Responses
1,256 cm2
1,256 cm2
5,024 cm2
5,024 cm2
125.6 cm2
125.6 cm2
62.8 cm2
The area of a circle is calculated using the formula A = πr^2, where r is the radius of the circle.
Given that the diameter is 40 cm, the radius would be half of that, which is 20 cm.
Plugging in the values:
A = 3.14 * (20)^2
A = 3.14 * 400
A = 1256 cm^2
Therefore, the area of the circle with a diameter of 40 cm is 1256 cm^2. Expressing it to the tenths place, the answer is 125.6 cm^2.
The correct response is:
125.6 cm^2