Answer: 9 and 1/3
Explanation:
First of all, you have to find the unit rate. So 28 divided by 2 = 14.
The bird flies at a unit rate of 14 miles in 1 hour.
Next, we need to find out what fraction of an hour is 40 minutes.
How many minutes in an hour? 60... so 40 would be 40/60 of an hour or 4/6 or 2/3 of an hour.
Next, remember the formula D=rt which is distance= rate multiplied by time
We can use this formula here: 14 times 2/3 = 9 and 1/3