The same sample of 25 seniors from the urban school district with the mean and standard deviation n(450, 100). a 95% confidence interval for µ for the population of seniors with a margin of error of ± 25 is used. what is the smallest sample size we can take to achieve this same margin of error?

26

45

50

62

69

Do i get charged for my membership before or after the 6 months

If 25% of y is 30, what is 60% of y?

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?