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January 29, 2015

January 29, 2015

Posted by **Jim** on Wednesday, December 12, 2012 at 9:28pm.

- calculus -
**bobpursley**, Wednesday, December 12, 2012 at 9:47pmdraw the figure.

she runs d1 down stream. that leaves 5-d1 left. The distance from that point to the end point is then

sqrt((5-d1)^2+1.5^2)= sqrt(xxxx)

time = d1/16 p + sqrt(xxxx )/5 p I dont know what the p is in kmp.

dtime/d1=0=1/16+1/2 ( xxxx )^-1/2 *2(5-d1)(-1)

1/16=(5-d1)/sqrt(xxxx)

multiply both sides by sqrt(xxxx)

then square both sides, you should get a quadratic and can solve d1.

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