The problem says:

How long to the nearest year will it take me to become a millionaire if I invest $1000 at 10% interest compounded continuously?

I used the formula

A(t) = Pe(^rt)

1000000 = 1000e(^.1t)

1000000/1000 = 1000/1000 e(^.1t)

1000 = e(^.1t)

is it possible to do: log1000/log e ?