It will take Janet 133 days to have $500 if she saves $20 per week.
To calculate the number of days it will take for Janet to have $500, we can follow these steps:
Determine the amount Janet needs to save: $500 - $120 = $380
Calculate the number of weeks needed to save the remaining amount: $380 ÷ $20/week = 19 weeks
Convert weeks to days: 19 weeks × 7 days/week = 133 days
Therefore, it will take Janet 133 days to have $500 if she saves $20 per week.