Help please!! (don't answer if u don't know)

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Find the commission on a $590.00 sale if the commission is 15%.