Answer 2) 50 hours is the correct answer.

          Sue works 40 hours per week for $20 per hour.  Multiplying her hourly rate ($20) by her hours worked (40) provides you with Sue’s regular base pay.

($20 per hour) (40 hours) = $800

          Subtracting this from the total of $1,100 provides you with her total bonus pay.

$1,100 - $800 = $300

          Knowing how much Sue made in bonus pay, at a rate of time and a half (1.5), we can calculate how many hours she worked over 40 hours.

300/(1.5 x 20) = 10 hours

40 + 10 = 50 hours worked