Use the following scenario and data for questions 34 to 40: The number of customers arriving at an ATM machine follows a Poisson distribution with a mean of equation per time unit. A time unit has 5 minutes. Use equation to denote the time between two customer arrivals. The mean (or expected value) of equation in minutes is closest to

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

The half-life of a certain material is 0.004 second. approximately how much of a 20-gram sample will be left after 0.016 second? a. 5 grams b. 16 grams c. 0.32 gram d. 1.25 grams