Jerry drew a scale drawing of a house
The original length of the entry is 10 feet long
When he drew it on paper, it was 0.5 ft
The length of the entry when drew on the paper = 0.5
=
To determine the scale factor he used
= Final length divided by the original length
Final length = 0.5 feet
Original length = 10 feet
Scale factor = 0.5 / 10
Scale factor = 0.05
The answer is 0.05