An octahedron and its net are shown below. All the faces are the same size and shape. What is the surface area of the octahedron?
1,152 cm2
10.4 cm
998.4 cm2
499.2 cm
12 cm
12 cm
12 cm
576 cm2

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?