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PLEASE READ THE BOTTOM I ADDED ON!! :) the ferris wheel at an amusement park measures 16m in diameter. the wheel does 3 rotations every minute. the bottom of the wheel is 1m above the ground...
a) determine the simplest equation that models Megan's height above that ground(h) over time (t). give 2 more equations that model the situation. please explain! :)
I need a cosine equation and why is the period 20 mins shouldn't it be 0.33, aren't u you suppose to divided 1 by 3 to get 0.33 as ur period (1 rotation per a min)

see related questions below. If you're still stuck, show us your work and your sticking point.

period 1/3 = 0.333 (1 revolution per a min)
k=2pi/1/3
= 6 pi
isnt that the k value why would it be 1/10 pi

You have figured the period in hours. Reiny did it in minutes, so his period is 6pi/60 = pi/10

• Advanced Functions - oops -

sorry. You did yours in minutes. He did his in seconds, but the ratio is the same.

oh okay thank you makes sense now! would it just be 8 cos (pi/10) +9 for the cosine equation? and what would the period be in seconds? and would that effect the question? cause the next question what is her height after 25 secs

Opss i didnt read that, i just refreshed the page! okok, so reiny did it in secs. but for cosine equation would it be 8 cos (pi/10) +9 or different

wait but why did reiny write 20 mins for the period?

• @ Lily - Advanced Functions -

sorry about the confusion , I just look back at my solution, that should have been 20 seconds
(at 3 rotations per minute --> 1 rotation in 20 seconds)
the math stays the same, t is in seconds

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