Help and explain please! The telephone company offers two billing plans for local calls. Plan 1 charges $31 per month for unlimited calls and Plan 2 charges $19 per month plus $0.06 per call.
Use an inequality to find the number of monthly calls for which Plan 1 is more economical than Plan 2? Let x represent the meaning of the answer to part a. The answer is__.

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.