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anonymous
 4 years ago
A subway train travels from one station to the next in 2 min. Its distance, in km, from the first station after t minutes is s(t) = t^2  1/3 t^3 . At what time will the train have a velocity of 0.5km/min?
anonymous
 4 years ago
A subway train travels from one station to the next in 2 min. Its distance, in km, from the first station after t minutes is s(t) = t^2  1/3 t^3 . At what time will the train have a velocity of 0.5km/min?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[s(t) = t ^{2} 1/3 t ^{3} \] so i know velocity = displacement / time then what should i do?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[v(t)=\frac{d}{dt}s(t)=t^2+2t=0.5\] http://www.wolframalpha.com/input/?i=2x^24x%2B1+%3D+0
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