If ten workers are each paid $9 an hour, but hiring the eleventh worker requires that all workers be paid $10 an hour, by how much does the total wage bill change once this worker is hired?

Question

Quizplus · Accepted Answer

Initially, the total wage bill for ten workers is 10 workers * $9/hour = $90. After hiring the eleventh worker, the wage for each worker increases to $10/hour, making the total wage bill 11 workers * $10/hour = $110. The change in the total wage bill is $110 - $90 = $20.

If Ten Workers Are Each Paid $9 an Hour, but Hiring