Question

Question was provided via image upload.

Explanation:

Step1: Convert time to days

3 days and 18 hours: 18 hours = $\frac{18}{24}$ = 0.75 days, so total time is 3 + 0.75 = 3.75 days.

Step2: Calculate watt - hours per day

Use formula: Rate = Total watt - hours / Total days. So 6750 / 3.75 = 1800.

Answer:

1800