Determine whether each set of side lengths represents an acute, obtuse, or right triangle.
2.8 ft, 14 ft, 16 ft
3. 9 in, 12 in, 15 in
4. 3.1 m, 5.9 m, 7.2 m

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