Question

4.4 circumference and area of a circle
jason runs 3 laps around a circular track with a diameter of 85 feet. to the nearest foot, how many feet did he run?
round to the nearest whole number

Explanation:

Step1: Find the circumference formula

The formula for the circumference of a circle is $C = \pi d$, where $d$ is the diameter.

Step2: Calculate the circumference of the track

Given $d = 85$ feet, so $C=\pi\times85\approx3.14\times85 = 266.9$ feet.

Step3: Calculate the total distance run

Jason runs 3 laps, so the total distance $D = 3\times C$. Substitute $C = 266.9$ feet, then $D=3\times266.9 = 800.7$ feet.

Step4: Round to the nearest whole number

Rounding 800.7 to the nearest whole number gives 801 feet.

Answer:

801