Given that the velocity of the falling parachutist can be computed by,

$\displaystyle v(t) = \frac{gm}{c}(1-e^{(\frac{c}{m})t})$

Use a first-order error analysis to estimate the error of v and t = 6, if g = 9.8 and m = 50 but c = 12.5 + or - 1.5.

I'm having a tough time starting this one. Can someone nudge me in the right direction?

EDIT: I just realized I posted this is the wrong section, it's clearly not an ODE can someone please move it?