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March 29, 2015

March 29, 2015

Posted by **Adam** on Saturday, April 26, 2008 at 6:16pm.

s=t^3–4t^2–7t t>=0

where s is measured in meters and t in seconds. When does the particle reach a velocity of 10 m/s?

- calc help -
**bobpursley**, Saturday, April 26, 2008 at 6:19pmTake the derivative:

v=3t^2 -8t -7

put v=10 and rearrange it to have a quadratic in standard format, solve the quadratic with the quadratic formula.

- calc help -
**Adam**, Saturday, April 26, 2008 at 6:26pmi got 1.39 and -4.06 but i still got it wrong

- calc help -

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