The average student loan debt for college graduates is $25,250. Suppose that that distribution is normal and that the standard deviation is $12,000. Let X = the student loan debt of a randomly selected college graduate. Round all probabilities to 2 decimal places and all dollar answers to the nearest dollar.

A. X ~ N( , )

B. Find the probability that the college graduate has between $20,000 and $30,000 in student loan debt.

C. The middle 30% of college graduates' loan debt lies between what two numbers?
Low: $
High: $

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d. what is the height of the tide after 93 hours?