The complete question can be found in the attached file
Find the number of feet represented by 1 inch In pete's blueprint (scale factor)
4 inches---------- > 3 feet=4/3 in/ft
1) 4 inches (pete's blueprint )------------ >3 feet (actual length)
16 inches----------------------------------- > X
X=16*3/4=12 feet
The actual length of the side wall is 12 feet
2) 4 inches (pete's blueprint )------------ >3 feet (actual length) X------------------------------------------- > 33 feet long
X=33*4/3=44 inches
The length of the back wall in the blueprint is 44 inches
3) How do you know your answer to 2 is reasonable?
We know that scale factor is 4/3 in/ft
I proceed to check it
length of the back wall in the blueprint is --------------- >44 inches
length of the back wall in the actual house --------------- >33 feet
44/33=4/3----------------- > is ok------- > the scale factor is correct
The answer is reasonable