Niah works as a retail sales clerk earning $18,000 per year. she plans to go to school for medical billing that has a median salary of $35,000. the cost of her education will be $20,000. if niah does not work for the 2 years that she is in school, about how long will it take her to recover her investment if she gets a medical billing job making the median salary when she graduates?

Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.