Salaries of 40 college graduates who took a statistics course in college have a mean x bar of $62,000’ Assuming a standard deviation, mu of $17,582, construct a 95% confidence interval for estimating the population mean mu.

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Select all of the following expressions that are equal to 2.5.

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas