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anonymous
 one year ago
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The sailor sails his boat at a constant speed of 12km/h staying 4km from and parallel to a straignt shoreline. How fast is the boat approaching a lighthouse on shore where boat 5km from the lighthouse?
anonymous
 one year ago
Related Rates The sailor sails his boat at a constant speed of 12km/h staying 4km from and parallel to a straignt shoreline. How fast is the boat approaching a lighthouse on shore where boat 5km from the lighthouse?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433040585514:dw I'm not sure though...

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0I think just take distance/ velocity = time

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The 12km/h, is going negative?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.012km/h = 12km/ 60 minutes, that is 1minute/ 0.2 km you have 5 km, then, it takes 25 minutes to finish the distance, right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I remember something about 12km/h from my teacher, but I'm not sure though.

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0if velocity has negative sign, that shows the replacement is opposite way to what you define positive direction. In this case, they use "speed" not velocity, hence, no negative here, period.

rational
 one year ago
Best ResponseYou've already chosen the best response.2hey still stuck on this

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes @rational I'll be right back, I have to eat dinner

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1so want to know the rate of change of the 'hypotenuse' of this triangle; what can we use to model the length of the hypotenuse?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433045913122:dw

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1d^2 = b^2 + 4^2 implicit derivative gives us 2d d' = 2b b' d' = b' b/d we know b' and b, and can determine d

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1or we know b' and d ... and can determine b either way

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433046508888:dw ???

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Given dx/dt =12km/h, find dz/dt=? when z=5km x^2+y^2=z^2 (2x)(dx/dt)+(2y)(dy/dt)=(2z)(dz/dt) ???

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0May the answer be 36/5=dz/dt??

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0My teacher said something about 12km/h, but dont know why...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Should it be 36/5km/h?? hmmm... :/

rational
 one year ago
Best ResponseYou've already chosen the best response.2yes, because the distance between lighthouse and boat is reducing

rational
 one year ago
Best ResponseYou've already chosen the best response.2in the diagram the boat is approaching near to the light house, yes ?

rational
 one year ago
Best ResponseYou've already chosen the best response.2since the distance is decreasing, the velocity is negative

rational
 one year ago
Best ResponseYou've already chosen the best response.2the distance is decreasing at a rate of 36/5 km per hour is same as saying the distance is increasing at a rate of \(\color{red}{}\)36/5 km per hour

rational
 one year ago
Best ResponseYou've already chosen the best response.2i have a debt of $100 is same as saying i have $100

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh I see! Thanks lots!
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