Answer:
The greatest possible error for 3.35 feet is 0.005 feet.
Explanation:
Given : The length of window is 3.35 feet .
To find : Greatest possible error
Solution :
The greatest possible error in a measurement is defined as half of the measuring unit.
3.35 feet is measured to the nearest hundredth of feet or 0.01 feet
Therefore, The greatest possible error is half of the measuring unit

So, the greatest possible error for 3.35 feet is 0.005 feet.