What are the reasons that sellers sell at equilibrium price? (Mark all that apply)

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

What is the value of x in the following equation. -x ^3/2 = -27

Luigi is the first person to finish a 5k race and is standing 13 feet beyond the finish line. another runner, mario, is still running the race and has approximately 24 feet before he reaches the finish line. what is the distance between mario and luigi? explain through words, numbers or pictures how you found the answer.