Sam bought a Blu-ray disc that normally costs $20. The store was running a sale that was a 15% discount for the disc. What was the amount of discount Sam got on his disc?

What is the product? (x2+3y+7) [yy+1)

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?

Can someone pls ! pls answer all. no explanation needed..