Geometry

The answer is D. 20.

 

1. Recall the Ruler Postulate:

The Ruler Postulate states that if two points and on a number line have coordinates and respectively, then the distance between them .

 

For points and with coordinates and , the distance .

 

2. Substitute the values of and into the formula:

Substitute and into .

First, calculate

Click "Show Answer" to reveal the answer and analysis