Question 1145663
babysitting $10/hour
tutoring $25/hour

x hours worked <= 10 hours
x money earned >= $130

worked 4 hours tutoring = 4 hours * $25 = $100 earned
$130 needed - $100 earned = $30 needed
$30/ $10 hour babysitting = 3 hours

as for the number of hours, 4 hrs tutor + 3 hrs babysit = 7 hrs, 7 hours < 10 hours its within the requirements 

Minimum # of hours babysitting = 3 hours