QUESTION:

The absorbance in a cell with a 1 cm path length, of a solution containing

NAD+ and NADH is 0.21 at a wavelength of 340 nm and 0.85 at 260 nm. The

molar extinction coefficient of both NAD+ and NADH at 260 nm is

1.8 x10^4 mol-1 dm^3 cm-1 , while the value at 340 nm for NADH is

6.22 x103 mol-1 dm^3 Cm-1. NAD+ does not absorb radiation of wavelength 340

nm. Calculate the concentrations of NAD+ and NADH in the solution

So i understand that i have to apply the beer lambert law for this question but im not sure on how to do so, can anyone give me some tips please?. Thanks in advance