Which equation shows a correct evaluation of (mn)(4)? m(x) = 4x-5
n(x) = 2x + 11
A.
(mn)(4) = 8(4) - 55
B.
(mn)(4) = 8(4)2 + 34(4) - 55
C.
(mn)(4) = 8(4)2 - 55
D.
(mn)(4) = 8(4)2 - 6(4) - 55

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?