Thread: log and natural log

i have no idea if im doing this correct

400 = (1 - e^-.2t
ln400 = -.2tln(500(1- e)
.2t = ln(500(1 - e)
ln(400)

im stuck here, any help would be great

im trying to solve for T which indicates times in the problem

Originally Posted by jasimmons86

i have no idea if im doing this correct

400 = (1 - e^-.2t
ln400 = -.2tln(500(1- e)
.2t = ln(500(1 - e)
ln(400)

im stuck here, any help would be great

im trying to solve for T which indicates times in the problem

Is this your problem?

there shpould be a negative(-) before the .2

but otherwise yes

no, typed the equation wrong

here is the correct one

400 = 500(1-e^ -.2t)

solve for t