Question

1. the entire class held hands and formed a big circle. if the circle was 40 feet across the center, then it was how many feet around? round the answer to the nearest foot. (use 3.14 for π.)

Explanation:

Step1: Find the radius

The diameter \(d = 40\) feet. The radius \(r=\frac{d}{2}\), so \(r=\frac{40}{2}=20\) feet.

Step2: Calculate the circumference

The formula for the circumference of a circle is \(C = 2\pi r\). Substitute \(r = 20\) and \(\pi=3.14\) into the formula: \(C=2\times3.14\times20\).
First, calculate \(2\times20 = 40\), then \(C = 40\times3.14=125.6\) feet.

Step3: Round the result

Round \(125.6\) to the nearest foot. Since the decimal part \(0.6\gt0.5\), we round up. So \(125.6\approx126\) feet.

Answer:

\(126\)