A company designs spinning toys using the family of functions y = cx 4 − x 2 , where c is a positive
constant. The figure above shows the region in the first quadrant bounded by the x-axis and the graph of
y = cx 4 − x
2 , for some c. Each spinning toy is in the shape of the solid generated when such a region is
revolved about the x-axis. Both x and y are measured in inches.

Can someone answer these problems for me

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

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?