Times taken to complete a task Here is a histogram showing
the times taken to complete
a task.
40
Estimate the percentage of 35
people who took less than
30
30 seconds to complete
the task.
25
Give your answer to
1 decimal place.
20
Frequency
Density 15
10
5
0
01
0 5 10 15 20 25 30 35 40 45 50
Time (seconds)

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?