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anonymous
 one year ago
At noon boat A is 100 km West of boat B. A is moving at 25 km/h South, and B is moving at 35 km/h North. At what rate is the distance between A and B changing at 4pm?
anonymous
 one year ago
At noon boat A is 100 km West of boat B. A is moving at 25 km/h South, and B is moving at 35 km/h North. At what rate is the distance between A and B changing at 4pm?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The change on horizontal distance (y) is 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Ahmadnedal thanks so much! How did you get 500?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1435204741155:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oops I'm sorry. It's 240 Since (35+25)*4=240 The speeds add up since they go in opposite directions

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The two boats can never be moving at a rate more than 70km/h away from one another.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I'm afraid there are other mistakes, if the idea is clear, just forget about the final numbers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Right, I don't quite understand [t(35+25)] this part.. i mean the logic behind it

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ahh okay, so using Pythag we always know the distance between the two boats...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0't' being the time passed in hours. Distance^2 = 100^2 + [(35+25)t]^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0U want the distance in the equation, which is x in this case, Distance=time*speed=x From that you can also find z, the other distance

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ex: after an hour, the boats will be 100km apart on the xaxis, and 70km apart on the yaxis right? after 2hrs, the boats will still be 100km apart on the xaxis, but 140km apart on the yaxis

sdfgsdfgs
 one year ago
Best ResponseYou've already chosen the best response.0dw:1435206276856:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Derp! YES It is 60... hah!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ohhh right! Now I get it! I totally forgot about the formula d=vt

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That makes sense now

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Be careful u forgot about many things Tracy ,just like me :P Good luck

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yep! You are solving for v in this problem.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1435206409506:dw So in fact, we are using pythag for this black triangle right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hahaha thanks @Ahmadnedal I've got an exam tomorrow morning >.<

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@gFunc Thanks so much!!! That was really really really helpful!! Appreciate it! xx

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0My pleasure! Good luck on the test!
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