Apatient receives 150 cc of medication in an iv drip over 4 hours. what is the rate per hour of this dose

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

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?