1. The following graph shows the height of a chair on a Ferris wheel as the wheel rotates.

Attachment 16596

How long does the Ferris wheel take to make 5 revolutions?

a. 100 s

b. 10 s

c. 20 s

d. 4 s

2. A ferris wheel takes 32 seconds to complete one revolution of the ride. The maximum height of the wheel is 23 metres and the minimum height is 1 metres.

How high is the hub or center of the ferris wheel off the ground?

3. A ferris wheel takes 33 seconds to complete one revolution of the ride. The maximum height of the wheel is 17 metres and the minimum height is 3 metres. If a trigonometric equation were created (using radians) to represent the height of the ferris wheel as a function of time, what would be the value of 'b' for the equation, to the nearest hundredth?

4. The distance above the ground of a passenger on a circular ferris wheel is given by the equation, h(t)= 5sin[0.22(t - 6)] + 2

where h, is the distance above the ground, in metres and t, is the time, in seconds, after the passenger passes the lowest point of the ride for the first time.

The distance of the passenger above the ground 6 seconds after passing the lowest point of the ride, to the nearest tenth of a metre, is

5. On a typical day at an oceanport, the water has a maximum depth of 22 m at 6:00am. The minimum depth of 14 m occurs 6.1 hours later. Assume that the relationship between the depth of the water and time is a sinusoidal function. The equation to represent this function can be written in the form y = a cos[b(t - c)] + d.

a) Determine the positive values of a, b, c and d.

b. What is the depth of the water, to the nearest tenth of metre, at 11:18 am?

c. At what time, to the nearest tenth of hour, does the water reach a depth of 15 m for the third time on the same day? Record your answer in 24 hour time system.

6. The pedals of a bicycle are mounted on a bracket whose centre is 28 cm above the ground. Each pedal is 15 cm from the centre of the bracket. Assuming that the bicycle is pedalled at 20 cycles per minute and that the pedal starts at time t = 0 s at the topmost position.

The equation to represent this function can be written in the form y = a cos[b(t - c)] + d, where y is the height of the pedal from the ground in cm and t is the time in seconds.

a. Determine the positive values of a, b, c and d.

b. Use your values from the previous bullet to find the height, to the nearest tenth of cm, of the pedal above the ground at time t = 5 seconds.

At what time, to the nearest tenth of second, does the pedal reaches its lowest position for the third time?

I think 1 is c. and the rest do not know how to do it.