4. A plumber charges $75 for a house call plus $45 per hour, h. If he charged $210 for the plumbing work, which equation would represent the situation to find how many hours of work he did? I A. $210 = $75h +S45 B. $210 = $45h +$75 C. $210h = $75 +545 D. 575 = 5210 + 545h
