Question

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the diameter of a circle is 6 kilometers. what is the circles circumference?
d=6 km
round your answer to the nearest hundredth.
kilometers
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Explanation:

Step1: Recall the formula for the circumference of a circle.

The formula for the circumference \( C \) of a circle when the diameter \( d \) is known is \( C=\pi d \).

Step2: Substitute the given diameter into the formula.

We are given that the diameter \( d = 6 \) kilometers. Substituting this into the formula, we get \( C=\pi\times6 \). Using the approximation \( \pi\approx3.14159 \), we calculate \( C\approx3.14159\times6 \).

Step3: Perform the multiplication and round.

\( 3.14159\times6 = 18.84954 \). Rounding this to the nearest hundredth (two decimal places), we look at the third decimal place, which is 9. Since 9 > 5, we round up the second decimal place. So \( 18.84954\approx18.85 \).

Answer:

18.85