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Mathematics 10 Online
OpenStudy (fanduekisses):

Calculus Related Rates HELP!

OpenStudy (fanduekisses):

On Halloween night, Charlie Brown has been trying to catch the Great Pumpkin as it rises from the pumpkin patch to bring all good calculus students presents and candy, so he can keep all the goodies for himself. Charlie spots the Great Pumpkin just starting to rise at a distance of 80 feet away. If the angle of elevation of the great Pumpkin is changing at the rate of 0.5 radians per second,

OpenStudy (fanduekisses):

a) How fast is the distance off the ground of the great Pumpkin changing when the great Pumpkin is 6 feet off the ground?

OpenStudy (fanduekisses):

I'm looking for dy/dt, right like the rate of change of the altitude/height

OpenStudy (perl):

|dw:1415740917400:dw|

OpenStudy (perl):

so we have the equation tan (theta ) = y/80 80 tan (theta ) = y take derivative with respect to time, both sides 80 * sec^2(theta) * dtheta/dt = dy/dt

OpenStudy (perl):

dtheta /dt was given , 0.5 rad/sec and you need to find theta, you can use tan(theta) = 6/80 , and solve for theta

OpenStudy (fanduekisses):

wait, why is the sec squared?

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