the scale of a map says that 4 cm represents5 km. What distance on the map in centimeters represents an actual distance of 4 kilometers

3.2 cm

Step-by-step explanation:

If we know that our ratio is 4 cm: 5 km. We can find the unit rate of the scale. Which would be 0.8 cm: 1 km. After we find the unit ratio we can then multiply both sides by 4. (4 * 0.8) : (4*1) After simplifying we get the ratio of 3.2cm: 4 km.

its 4 because 2 times 2 is 4, if you double the number two you get four