Find the zeros of y = x^2 - 4x - 9 by completing the square. a. x = -2 ± √13 b. x = 2 ± √13 c. x = ±3 d. x = 3 ± √13

The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)