Hello, magentarita!

I will assume that: .

Can't you set up the equation?In 1893, George Ferris engineered the Ferris Wheel. It was 250 feet in diameter.

If the wheel makes 1 revolution every 40 seconds, then: .

represents the height , in feet, of a seat on the wheel as a function of time ,

where is measured in seconds. The ride begins when

(A) During the first 40 seconds of the ride, at what time

is a person on the Ferris Wheelexactly125 feet above the ground?

The question is: When is ?

We have: .

Then: .

Hence: .

Answers: .

The rider is above 125 feet on the interval:(B) During the first 40 seconds of the ride, over what interval of time

is a person on the Ferris Wheelmore than125 feet above the ground?