Aball is thrown from an initial height of 3 feet with an initial upward velocity of 28 ft / s. the ball's height
h (in feet) after t seconds is given by the following.
h = 3+28t-16t^2. find all values of t for which the ball's height is 11 feet.
round your answer(s) to the nearest hundredth.
(if there is more than one answer, use the "or" button.)

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?