An hourglass, composed of two identical cones, is 12 cm tall. the radius of each cone is 3 cm. if you want to fill the bottom half of the hourglass full of salt, how much salt will you need? explain the method you would use to find the amount of salt.

When drawing a trend line for a series of data on a scatter plot, which of the following is true? a. there should be an equal number of data points on either side of the trend line. b. all the data points should lie on one side of the trend line. c. the trend line should not intersect any data point on the plot. d. the trend line must connect each data point on the plot.

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

How many days was the temperature above 90 degrees?