Algebra help pls

First one    See :  https://web2.0calc.com/questions/check-my-answer-please_1

Second One

The high and low of the ferris wheel describe the DIAMETER

    High 55   Low 5       Diameter  50   radius 25 yds

Low point 5 (assumed to be ground level)  High point  55      50 yds  above the ground

Low point 9s    next low point  21 sec       takes 12 seconds for one rev

At t= 0   according to the table   ferris wheel height is 30 yds     Low point is at t=9s  5 yds