A plane is approaching an airport. It is 12 km from the point of observation on the ground and makes an
angle of elevation of 50 degrees with the ground.
Find the height above the ground to the nearest
tenth of a meter.

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