S ={x|x are numbers completely divisible by 5 and x<100} Q = {x|x are all two digit numbers whose last digit is zero}
Find n(snd).

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18