How do I find the 90 percent confidence interval for u assuming the sample is from a normal population. X=40, o=7, n=13.

Write the following as a base and exponent

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !