A simple random sample of size n=21 is drawn from a population that is normally distributed. The sample mean is found to be x = 63 and the sample standard deviation is found to be s = 18. Construct a 95% confidence interval about the population mean.

On any given day, the number of users, u, that access a certain website can be represented by the inequality 1125-4530 which of the following represents the range of users that access the website each day? u> 95 or u < 155 95> u> 155 u< 95 or > 155 95

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?