The distribution of the number of daily requests is bell-shaped and has a mean of 46 and a standard deviation of 5. using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 36 and 46?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?