Transpose formula to find a value Can someone help with this please?
Ive differentiated a formula to get a value, now I need to find the positive value for t for when $\frac{dR}{dt} = 0$
So:
$0 = (27t^{0.5}    e^{-3t}) + (-54t^{1.5} e^{-3t})$
How would go about finding t here?

You can divide out $27t^{0.5}e^{-3t}$ and be left with a linear equation.
