Fluorescent light bulbs have lifetimes that follow a normal distribution, with an average life of 1,685 days and a standard deviation of 1,356 hours. in the production process the manufacturer draws random samples of 197 light bulbs and determines the mean lifetime of the sample. what is the standard deviation of the sampling distribution of this sample mean?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.

Which of the functions below could have created this graph?