What is the exact circumference of a circle with a radius of 15 cm?

Since pi is irrational and it is used in the formula, we cannot give an exact answer except in terms of pi (we can give an aproxamation using 3.14 = aprox pi, but it is not exact)

ok

circumfernce=2pir

r=15

circumference=2pi15

circumference=30pi

exact=30pi cm

if you want to aprox pi=3.14 then

aprox circumfernce=94.2 cm

The Answer is 94.2 the equation is C=2*3.14*r