Salaries of 40 college graduates who took a statistics course in college have a​ mean, x​, of $ 69,100. Assuming a standard​ deviation, sigma​, of ​$14,464construct a 90​% confidence interval for estimating the population mean, μ

Use sigma notation to represent the following series for 9 terms.

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your

Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?