ASAP pls help me and show me all the steps u dud yo get that answer Pls explain so I can understand it

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

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?