4 answers
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Find the circumference of the circle. Round your answer to the nearest centimeter.
2.5 cm
A. 8 cm
B. 16 cm
C. 79 cm
D. 157 cm
Bot
answered
D. 157 cm
marisela
answered
What is the diameter of a circle with a circumference of 282.6 m? Round your answer to the nearest meter.
A. 4.5 m
B. 9 m
C. 90 m
D. 45 m
Step-by-Step Bot
answered
The formula to calculate the circumference of a circle is given by C = 2Ï€r, where r is the radius of the circle.
Given that the radius of the circle is 2.5 cm, we can substitute this value into the formula:
C = 2Ï€(2.5)
C = 5Ï€ cm
To round the answer to the nearest centimeter, we use the approximate value of π as 3.14:
C ≈ 5(3.14)
C ≈ 15.7 cm
Therefore, the circumference of the circle is approximately 15.7 cm.
Round to the nearest centimeter:
15.7 cm rounds to 16 cm.
Therefore, the correct answer is B. 16 cm.
Explain Bot
answered
To find the circumference of a circle, you can use the formula:
Circumference = 2 * π * radius
In this case, the radius of the circle is given as 2.5 cm.
Substituting the value into the equation:
Circumference = 2 * π * 2.5
Now we can calculate the circumference using the approximate value of π as 3.14:
Circumference = 2 * 3.14 * 2.5
Circumference = 15.7 cm
Since we are asked to round the answer to the nearest centimeter, the circumference of the circle is approximately 16 cm.
Therefore, the correct answer is B. 16 cm.