Angel is a waiter at a restaurant. Each day he works, Angel will make a guaranteed wage of $30, however the additional amount that Angel earns from tips depends on
the number of tables he waits on that day. From past experience, Angel noticed that
he will get about $15 in tips for each table he waits on. How much would Angel expect
to earn in a day on which he waits on 15 tables? How much would Angel expect to
make in a day when waiting on t tables?