kobeni-chan
  • kobeni-chan
Fan and Medal! :) Sandra is riding the Ferris wheel, and her height can be modeled by the equation H(t) = 25 cos[(pi/14)t] + 31, where H represents the height of the person above the ground in feet at t seconds. How far above the ground is Sandra before the ride begins?
Mathematics
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SOLVED
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chestercat
  • chestercat
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kobeni-chan
  • kobeni-chan
I thought that I would be substituting t for 0, and then solving, but I got stuck >_< Right now I have 25 cos(0) + 31
kobeni-chan
  • kobeni-chan
@ganeshie8 @Tootles143 @pooja195 Please can someone help me? :(
kobeni-chan
  • kobeni-chan
@77777jeannie77777 @cupcakerain @Gokuporter @Awolflover1

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More answers

kobeni-chan
  • kobeni-chan
@amilapsn @Omar_Elboredy
anonymous
  • anonymous
cos(0) = 1 so assign it and you have the height
anonymous
  • anonymous
So .. What before the ride begins mean ? It means that just starting the ride which implies that it is wanted to get the height at time(t) = 0 then substituting back into the equation with this time you will get : H(0) = 25 cos( (π/14)*0 ) + 31 = 25 cos(0) + 32 = ? Solve it Urself ! :D Let me know if you got it :)
anonymous
  • anonymous
*31
kobeni-chan
  • kobeni-chan
I got 25 32. But I don't know what to do about the space :/
anonymous
  • anonymous
25+ 32
anonymous
  • anonymous
Your equation after subs. by t = 0 will be sth like that : 25 cos(0) + 31 = .... Ok ?
anonymous
  • anonymous
It's 31 not 32 , I re-corrected it ! :D
kobeni-chan
  • kobeni-chan
Wait so do I add them to get the height or do I leave it as an equation??
anonymous
  • anonymous
You have to add them to get the height
anonymous
  • anonymous
yeah t=0 H(0) = 25+32 = 57 which is the height at t=0
kobeni-chan
  • kobeni-chan
Ok thank you guys :) And since it doesn't give a unit of measure, I just say 57 units, right?
anonymous
  • anonymous
"H represents the height of the person above the ground in ""feet"" " The given unit is "feet" ! :) So the answer will be : 57 feet above the ground
kobeni-chan
  • kobeni-chan
Oh I can't believe I missed that >_< thanks again!

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