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 Post subject: (If you cannot read it, please let me know) - Find arclengthPosted: Mon, 21 May 2012 04:35:43 UTC
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Joined: Sat, 20 Nov 2010 21:17:02 UTC
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A hawk flying at 11 m/s at an altitude of 132 m accidentally drops its prey. The parabolic trajectory of the falling prey is described by the equation:

y = 132 − (x^2/33)

until it hits the ground, where y is its height above the ground and x is its horizontal distance traveled in meters. Calculate the distance traveled by the prey from the time it is dropped until the time it hits the ground. Express your answer correct to the nearest tenth of a meter.

http://i1084.photobucket.com/albums/j40 ... IMG009.png

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 Post subject: Re: (If you cannot read it, please let me know) - Find arclePosted: Mon, 21 May 2012 05:28:05 UTC
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Joined: Fri, 19 Oct 2007 16:16:19 UTC
Posts: 26
Location: Baltimore, MD (USA)

I think you got the parentheses wrong around the second square root when you entered the expression into your calculator. For if I replace with in the above expression, I too get the erroneous answer of 125.48.

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 Post subject: Re: (If you cannot read it, please let me know) - Find arclePosted: Mon, 21 May 2012 16:45:17 UTC
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Joined: Sat, 20 Nov 2010 21:17:02 UTC
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Reckoner wrote:

I think you got the parentheses wrong around the second square root when you entered the expression into your calculator. For if I replace with in the above expression, I too get the erroneous answer of 125.48.

That was it! Thank you.

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