4. Write down and compare the functions that represent the area and circumference of a circle. (A=n•3.14•r2 and C = 2 •3.14•r) Are they linear or nonlinear? What are the dependent and independent variables? What are
the values of the circumference when the independent variable equals 1, 2, or 3?

70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?