Answer
(a) $P=42x-35,000$
(b) $P=175,000$
Work Step by Step
(a) $P=R-C=135x-(93x+35,000)=42x-35,000$
(b) Now, make $x=5000$:
$P=42(5000)-35,000=210,000-35,000=175,000$
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