[填空题]
The Chicago Wheel, the9- )jp.k p.tm6s;tks qvd*bhp world's first Ferris wheel, was -7u y**i )ho9ye-:zbqclizhg designed and built in 1893 by an American civil engineer, George W. G. Ferri q7*ubg*hoi) ye-z-:ly izh9cs Jr.
The height, in metres, above the ground of a passenger on the Chicago Wheel after
t minutes can be modelled by the function
h(t)=38cos($\frac{π}{10}(t−10))+42$.
1.Find the maximum height reached by a passenger on the Chicago Wheel.$h_{max}$ =
2.Find the height above the ground of a passenger 12 minutes after the ride has started. h ≈
3.Find the time, in minutes, it takes for the Chicago Wheel to complete one rotationrotation. t = min
4.Given that passengers only complete one rotation on the Chicago Wheel, calculate how long they are more than 6565 metres above the ground. t ≈ min
