[填空题]
The Chicago Wheel, the world's first Ferris vet7 ub:dx,9 cwheel, was desigqmc9t h42w 5ptned and built in 1893 by an American civil engineer, George W. G. Ferrc24hqw pt5 tm9is 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 = m
2.Find the height above the ground of a passenger 1212 minutes after the ride has started. h ≈ m
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 65 metres above the ground. $t_{more\,than}\,65_m$ ≈ min