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1. A Ferris wheel of diameter 16.5 m rotates at a rate of 0.25 rad/s. If passengers board the lowest car at a height of 1 m above the ground, determine a sine function that models the height, h, in metres, of the car relative to the ground as a function of the time, t, in seconds. vVv 2. Typical household voltage varies according to the equation y = 120cos60nt, where t is the time, in seconds, and is the voltage, in volts. Determine the voltage after 1 min. v vv 3. A skateboard ramp is built with an incline angle of 15. If the base of the ramp is 3 m in length, determine the height of the ramp. vv