Answer:
The distance between E and F is 5 units
Explanation:
E and F are share the same y-coordinates. So for this part it is okay to not use the distance formula.
So you will be having:
E (5,8) and F (5,3)
EF = 8-3=5
OR
YOU CAN USE THE DISTANCE FORMULA AS INDICAYED IN THE PICTURE.
Hopefully the picture is clear and understandable and younger the explanation.