The circumference C of a circle is a function of its radius given by C (r) = 2Tr. a. Express the radius of a circle as a function of its circumference. Call this function r (C). Enter the exact answer. Enclose numerators and denominators in parentheses. For example, (a - b) / (1 + n). sin (a) OO a ? r C = STP b. Find r (367) and interpret its meaning. r (367) = Number O The radius of a circle with a circumference of r (367) is 367 . O The radius of a circle with a circumference of 367 is r (367)