Final answer:
To find Mikayla's hourly rate for tutoring, divide her total earnings of $420 by the total hours worked, which is 35 hours (7 hours/day x 5 days), resulting in an hourly rate of $12 per hour.
Step-by-step explanation:
Mikayla worked for 7 hours each day for 5 days and earned a total of $420 from tutoring. To calculate her hourly rate, we divide the total earnings by the total number of hours worked.
First, calculate the total number of hours Mikayla worked by multiplying the hours worked each day by the number of days: 7 hours/day × 5 days = 35 hours.
Next, divide her total earnings by the total number of hours worked to find the hourly rate: $420 ÷ 35 hours = $12/hour.
Thus, Mikayla's hourly rate for tutoring is $12 per hour.