Consider a circle whose size can vary. The circumference of the circle is always 2r times as large as its radius, Let 7' represent the radius of the circle (in cm) and let 0 represent the circumference of the circle (in cm). a. What is the approximate value (rounded to 2 decimal places) of 21:? I:. l_ii l'nler an algebraic equalmn [more (1. As the radius of a circle, 1', increases from 4 cm to 6 cm, the circumference of the circle increases from [:3 to |::J~ . d. A circle's circumference is :l:: times as large as the circle's diameter, d. e. What is the relative size of (how many times as large) a circle's' circumference C to its diameter, (1? [:l:: b. Write a formula that expresses C in terms of r. f. Write an equation to detennine the radius of a circle, 7', that has a circumference of 17 cm. / Z\