Adams High and Jefferson High both lose 150 students each, Madison High's population increases by 100 students, and both Lincoln High and Grant High gain 50 students each what happens to the mean of the population of Washington County Schools.

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

What is the sum of these mixed numbers 4 2/3+ 3 1/9