Asurvey of several 10 to 13 year olds recorded the following amounts spent on a trip to the mall: $28.64,$24.42,$19.35,$22.14construc t the 95% confidence interval for the average amount spent by 10 to 13 year olds on a trip to the mall. assume the population is approximately normal. step 1 of 4 : calculate the sample mean for the given sample data. round your answer to two decimal places.

The only way to identify an intercept is as an ordered pair. true false

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?

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)