Final answer:
To calculate your sister's total earnings, you need to multiply the number of hours she works (H) by her hourly rate (N).
Step-by-step explanation:
To calculate your sister's total earnings, you need to multiply the number of hours she works (H) by her hourly rate (N). This can be represented by the equation:
Total earnings = H x N
For example, if your sister works 10 hours a day for 5 consecutive days and earns $20 per hour, her total earnings would be:
Total earnings = 10 x 20 = $200