A study intends to estimate a population mean with an unknown population standard deviation and a sample size of 15. Which of the following is closest to the appropriate critical value to create a 98% confidence interval?

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

An electrician cuts a 136 foot long piece of cable. one piece is 16 feet less than 3 times the length of the other piece. find the length of each piece

Jake volunteers to out his younger brother's basketball team in his free time. one of his tasks is to ensure that all the basketballs have enough air in them. given that a properly inflated basketball measures 8.8 inches across, what is the total volume of air inside six of jake’s basketballs? assume that the wall of each ball is infinitely thin.