Exponential Attenuation Practice Problems

A large number of photons (N_0 = 106) interacts with a material having length L = 4.0 cm by two processes: one absorption process with a linear attenuation coefficient \mu_1 = 0.33 cm-1, and one scattering process with a linear attenuation coefficient \mu_2 = 0.31 cm-1. Assuming narrow-beam geometry, what is the number of photons (N) that reaches the detector? Also, how many photons interact via process 1 (\Delta N_1) and process 2 (\Delta N_2)? (Only enter integers for answer, no commas or scientific notation please)

N =
\Delta N_1 =
\Delta N_2 =