Let x = the time between two successive arrivals at the drive-up window of a local bank. if x has an exponential distribution with λ = 1, (which is identical to a standard gamma distribution with α = 1), compute the following. (if necessary, round your answer to three decimal places.) (a) the expected time between two successive arrivals 1 (b) the standard deviation of the time between successive arrivals 1 (c) p(x ≤ 1) .632 (d) p(2 ≤ x ≤ 4) .117

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

Which equation represents the function on the graph?

Mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.