Plz help me well mark brainliest if correct

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?