Answer:
23 months ( 1 and 11/12) years
Step-by-step explanation:
Starting point is $4 an hour, if she makes $0.25 raising each month, it would take 23 because of:
0.25 x 23 = 5.75
Donna makes $9.75 an hour at her job.
So if she has 23 months, (with the 0.25 raise each month)
$4 + $5.75 = $9.75
Making it 23 months.
Hope it helps! :)