Customers make purchases at a convenience store, on average, every eight and half minutes. It is fair to assume that the time between customer purchases is exponentially distributed. Jack operates the cash register at this store. Required:
a. What is the rate parameter?
b. What is the standard deviation of this distribution?
c. What is the probability that a customer will show up in less than five minutes?
d. What is the probability that nobody shows up for over half an hour?

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?

Igure 1 and figure 2 are two congruent parallelograms drawn on a coordinate grid as shown below: 4 quadrant coordinate grid showing two parallelograms. figure 1 has vertices at negative 5, 2 and negative 3, 4 and negative 4, 7 and negative 6, 5. figure 2 has vertices at 5, negative 2 and 7, negative 4 and 6, negative 7 and 4, negative 5. which two transformations can map figure 1 onto figure 2? reflection across the y-axis, followed by reflection across x-axis reflection across the x-axis, followed by reflection across y-axis reflection across the x-axis, followed by translation 10 units right reflection across the y-axis, followed by translation 5 units down

Over the course of a month, a person's weight decreases. what type of relationship is this? a. positive relationship