2. twenty teenagers were asked the question “how many hours of sleep do get a night? ”. the sample had a mean of 6.5 hours and a standard deviation of 0.75 hours. find the 95% confidence interval for the number of hours of sleep per night. show all your work the way we did in class!

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

Uestion 1(multiple choice worth 5 points) (05.02)alex wants to paint one side of his skateboard ramp with glow-in-the-dark paint, but he needs to know how much area he is painting. calculate the area of the isosceles trapezoid. isosceles trapezoid with top base 12 feet, bottom base of 18 feet, and height of 6 feet. 72 ft2 84 ft2 90 ft2 108 ft2

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?