The population mean annual salary for flight attendants is $56,275. A random sample of 48 flight attendants is selected from this population. Assume the population standard deviation is $1800. What is the probability that the mean annual salary of the sample is less than $56,100?

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

The perimeter of a quarter circle is 14.28 miles. what is the quarter circle's radius?