Final answer:
To calculate Mrs. Brown's pension, the average of her last 3 years' salaries was first computed, then 1.8% of that average was taken for each year she worked, resulting in an annual pension of $18,939.72.
Step-by-step explanation:
First, we need to calculate the average of Mrs. Brown's last 3 years' salaries:
Average salary = ($38,592 + $37,590 + $37,010) / 3
Average salary = $113,192 / 3
Average salary = $37,730.67
Next, we calculate the pension by taking 1.8% of the average salary for each year of work:
Pension = 1.8% × average salary × number of years worked
Pension = 0.018 × $37,730.67 × 28 years
Pension = $18,939.72
Therefore, Mrs. Brown's annual pension will be $18,939.72.