4 customers at a gas station this morning each purchased the same type of gasoline. Numbers of gallons of gasoline are 7.5,13,10.5,6.25total cost are $30,#52,$42,$25using the data in the table above, what is the constant proportionality, k,that can be used to find the total cost, C,for n gallons of this type of gasoline?

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?