I dont know if this is the right place for this thread.

1.) A picture supposedly painted by Vermeer (1632-1675) contains 99.5% of its carbon-14 (half-life 5730 yrs) From this information decide whether the picture is a fake. Explain reasoning.

I know the equation for exponential growth/half life stuff is P=(Po)(e^kt)

I dont know where to go from there.