Question

find the circumference and the area of a circle with radius 7 cm. use the value 3.14 for π, and do not round your answers. be sure to include the correct units in your answers circumference: area:

Explanation:

Step1: Calculate the circumference

The formula for the circumference of a circle is \(C = 2\pi r\). Given \(r = 7\) cm and \(\pi=3.14\), substitute the values:
\(C=2\times3.14\times7\)
\(C = 6.28\times7\)
\(C=43.96\) cm

Step2: Calculate the area

The formula for the area of a circle is \(A=\pi r^{2}\). Substitute \(r = 7\) cm and \(\pi = 3.14\):
\(A=3.14\times7^{2}\)
\(A=3.14\times49\)
\(A = 153.86\) \(cm^{2}\)

Answer:

Circumference: \(43.96\) cm
Area: \(153.86\) \(cm^{2}\)