Answer:
No, Tony should have rounded up to 38.
Explanation:
Tony solved the inequality correctly; however, he rounded incorrectly.
8c+200≥500
Subtract 200 from both sides
8c≥300
Divide each side by 8
c≥37.5
Tony cannot wash 37.5 cars, because in the context it is impossible to wash half of a car. We round the answer up because rounding down would give us a value less than $500 (the inequality is greater than or equal to).
Therefore, the answer is 38. Tony is incorrect.