A street noodle vendor (one server) in Singapore can service an average of 20 customers per hour. Given an average arrival rate of 12 customers per hour, calculate the mean waiting time in the system (being served and in the queue). Group of answer choices 4.5 minutes 2.5 minutes 1.5 minutes 3.5 minutes 7.5 minutes

John and sue smith are a married couple who file a joint income tax return. they have two children, so they claim a total of 4 exemptions (based on calendar year 2015 tax law, a personal exemption of $4,000 per person or dependent can be deducted from total income). in addition, they have legitimate itemized deductions totaling $25,750. their total income from wages is $237,500. what is the couple’s taxable income? $195,750 $221,500 $229,500 $205,750