Find the circumference of the circle. Give the exact circumference and then an approximation. Use pialmost equals3.14. A circle that has a diameter of 39 centimeters. 39 cm The exact circumference of the circle is 122.46 centimeters. (Simplify your answer. Type an exact answer in terms of pi.) The approximate circumference of the circle is nothing ▼ square centimeters. centimeters. (Type a whole number or decimal rounded to the nearest hundredth as needed.)

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?