Final answer:
The unit rate for the humpback whale in miles per day is 150 miles/day.
Step-by-step explanation:
To find the unit rate for the humpback whale in miles per day, we need to know the total distance the whale travels in a given time period. Let's assume the whale travels 150 miles in a day. To calculate the unit rate, divide the total distance traveled by the number of days: 150 miles / 1 day = 150 miles/day. Therefore, the unit rate for the humpback whale is 150 miles per day.