Consider a circle whose size can vary. let
r
represent the radius of the circle (in cm) and let
c
represent the circumference of the circle (in cm). suppose the function
f
determines the circumference of the circle in cm,
c
, given its radius length in cm,
r
.

write a function formula for
f
.

(c) the diagram shows the first three shapes of a matchsticks arrangement. first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.