Question

circumference
danielle is baking cookies. she uses a circular cookie cutter with a diameter of 3 cm.
what is the circumference of each cookie?
use 3.14 as an approximation of π.
rounded to the nearest tenth.
□ cm

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 values

We are given that the diameter \( d = 3 \) cm and \( \pi\approx3.14 \). Substituting these values into the formula, we get \( C = 3.14\times3 \).

Step3: Calculate the product

\( 3.14\times3=9.42 \).

Step4: Round to the nearest tenth

Rounding \( 9.42 \) to the nearest tenth gives \( 9.4 \) (since the digit in the hundredth place is 2, which is less than 5, we round down the tenths place digit).

Answer:

\( 9.4 \)