Problemas con ejercicios de decimales relacionados al projimo

ayuda pls

Little’s law firm has just one lawyer. customers arrive randomly at an average rate of 6 per 8 hour workday. service times have a mean of 50 minutes and a standard deviation of 20 minutes. how long does a customer spend at little’s law firm on average?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u