Question

Find the Circumference.
a) Give an exact answer in terms of pi.
42pi C=pi*d=pi.pi*42=42pi.

Use pi~22/7,and express your answers as a fraction in lowest terms.

Answer 1

I have no idea what your line

42pi C=pi*d=pi.pi*42=42pi.

is supposed to say or mean.

Are you saying the
C = 42π ??
in that case the radius would be 21 units
and the answer is in exact form

now if we use the approximation of 22/7 for π
we get C = 42(22/7) = 132

42π expressed as a decimal correct to 6 decimals would be 131.946892