Final answer:
The amplitude of the cosine function represents the radius of the Ferris wheel. To find the diameter, multiply the radius by 2, resulting in a diameter of 190 feet, making option C) 190 ft the correct answer.
Step-by-step explanation:
The function mentioned seems to be incomplete, but assuming it is t(t) = 95 cos(120t) or a similar format, it represents the height of a seat on a Ferris wheel as a function of time t, where 95 is the amplitude of the cosine function. The amplitude of this trigonometric function in the context of a Ferris wheel corresponds to the radius of the Ferris wheel. Therefore, to find the diameter, we simply multiply the radius by 2.
Diameter of the Ferris wheel = 2 × Radius = 2 × 95 = 190 feet.
The correct answer is C) 190 ft, which is the diameter of the Ferris wheel.