PLEASE HELP! I don't know how to find the sample mean in this example because there is no data set. A random sample of 45 Hollywood movies made since 2010 is 130.5 minutes with a sample standard deviation of 13.8 minutes. Construct a 95% confidence interval for the true population mean length of all Hollywood movies since 2010.

what is the sample mean?

What is the quotient of 42/3 divided by 4 1/5

An airplane consumes fuel at a constant rate while flying through clear skies, and it consumes fuel at a rate of 64 gallons per minute while flying through rain clouds. let c represent the number of minutes the plane can fly through clear skies and r represent the number of minutes the plane can fly through rain clouds without consuming all of its fuel. 56c+64r < 900056c+64r< 9000 according to the inequality, at what rate does the airplane consume fuel while flying through clear skies, and how much fuel does it have before takeoff? the airplane consumes fuel at a rate of gallons per minute while flying through clear skies, and it has gallons of fuel before takeoff. does the airplane have enough fuel to fly for 60 minutes through clear skies and 90 minutes through rain clouds?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?