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Given s=t^(2)+5t+3, find (ds)/(dt)...

Given `s=t^(2)+5t+3`, find `(ds)/(dt)`

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The correct Answer is:
`8.48 m` from O

COME: `K_(C)+U_(C)=K_(D)+U_(D)`
`4+2[(Kqxx(-q))/5]=0+((Kqxx-2)/r)`
`4-(2xx9xx10^(9)xx25xx10^(-10))/5`
`=(-2xx9xx10^(9)xx25xx10^(-10))/(r), r=9 m`
`OD=sqrt(AC^(2)-OA^(2))=sqrt(9^(2)-3^(2))=8.48m`
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