The number of hours between successive trains is t which is uniformly distributed between 1 and 2. passengers arrive at the station according to a poisson process with rate 24 per hour. let x denote the number of people who get on a train. find (a) ex, (b) var (x).

Let r = 3. what is the value of r + 58?

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.

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?