For the following set of data, find the percentage of data within 1 population standard deviation of the mean, to the nearest 10th of a percent. 62, 47, 58, 63, 59, 60, 56, 59

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

What is the number 321,000,000 in scientific notation? also what is the number? ?