The time it takes to complete a degree at asu can be modeled as an exponential random variable with a mean equal to 5.5 years. what is the probability that it takes an asu student 4.5 or fewer years to graduate? express your answer to four decimal places.

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

3x + 4y = 5 x- 3y = -7 solve by substitution