What's the question?
If it's "What's the difference?" or something like that, then the answer is 15. :)
To make it easier convert the times all into minutes.
2 hours 20 minutes = 120 minutes + 20 minute = 140 minutes
4 hours 10 minutes = 240 minutes + 10 minutes = 250 minutes
Then subtract:
250 minutes - 140 minutes = 110 minutes
Convert back to hours/minutes:
110 minute = 1 hour and 50 minutes
Answer:
The area for a square is given by:

And we can find the dimension for one side like this:

Replacing we got:

Then since we are interested in the how many feet of fencing does she need, we can find the perimeter given by:
and replacing we got:

Step-by-step explanation:
For this case we know that Suzanne want to put a fance around a square garden with an area of 49 ft^2
The area for a square is given by:

And we can find the dimension for one side like this:

Replacing we got:

Then since we are interested in the how many feet of fencing does she need, we can find the perimeter given by:
and replacing we got:
