David works as a firefighter, receiving an annual salary of $47,730.00. He also owns stocks that pay a dividend. Last year, David earned $72,175.00 in total income. What was the amount of David's unearned income?

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18