Which of the following do indexes and scales have in common?
a. they are interval measures.
b. their attributes form an intensity structure.
c. they rank-order the units of analysis in terms of specific variables.
d. their scores represent a pattern of response.
e. they are nominal measures.

c.They rank-order the units of analysis in terms of specific variables

Step-by-step explanation:

An index is a way  of compiling one score from a variety of  questions or statement that represents a belief, feeling or attitude.

Scales on the other hand measure levels of intensity at a variable level like how much a person agrees or disagrees with a particular statement.

The one thing common to both  indexes and scales is that

They rank-order the units of analysis in terms of specific variables.

both equations and proportions are better.

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.