Marcus gathered data on the average time it takes for students to get to school each morning. Of all the responses, 10 people said 15 minutes, 18 people said 30 minutes, and 12 people said 25 minutes. If the standard deviation of the population is 5.64 minutes, what is the 95% confidence interval for the population mean?

The sum of the product of 4 and x and the product of 7 and y is 61. the sum of the product of 12 and x and the product of 21 and y is 61. what are the values of x and y?

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?