The average natural gas bill for a random sample of 21 homes in a certain city during the month of march was $311.90 with a sample standard deviation of $51.60. what is the standard error of the mean for this sample?

Franco wants to double the volume of the cone. what should he do?

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?

Analyze the diagram below and complete the instructions that follow. 56 find the unknown side length, x write your answer in simplest radical form. a 2047 b. 60 c. sv109 d. 65 save and exit next s and return