Question

The radius of a circular car tire is 12.5 inches. Find the circumference Use N=3.14
A.39.25in
B. 14.4in
C 62.53in
D 78.5in
and
Use N=3.14 to estimate the area of the circle. Round your answer to the nearest hundred, if Necessary
A. 44.27m2
B. 177.1m2
C. 624.26m2
D. 2,497.05m2
plz help

Answer 1

The circumference of a circle
\[C= 2\pi r\]where \(r\) is the radius of the circle,
and \(\pi\approx3.14\)

Answer 2

So, for the first:

\[C = 2\times3.14\times12.5\,[\textrm{in}]\\
\quad=\]

Answer 3

Sorry to disturb but what does N mean?

Answer 4

N is supposed to be pi i think...

Answer 5

n=inches

Answer 6

Area of a circle=pi*r^2