A company is looking to hire a lawyer. One law firm states that their legal fees can be determined using the expression 400x23000, where x
is the number of hours of legal assistance. A second law firm states that their legal fees can be determined using the expression 420x18000. The company president wants to know when the legal fees would cost the same for each law firm. What number of hours of legal assistance makes the equation 400x23000420x18000 true? Round your answer to the nearest whole number.
Answer choices:
A: 125
B: 188
C: 250
D: 313
E: 375