Carrie and krystal are taking a road trip from greenville to north valley. each person has her own map, and the scales on the maps are different.
a. on carries map, greenville and north valley are 4.5 inches apart. the scale on her map is 1 inch=20 miles
b. the scale on krystal's map is 1 inch=18 miles. how far apart are greenville and north valley on krystal's map.

5 inches

Step-by-step explanation:

Given: On Carrie's map, Distance from Greenville and north valley=4.5 inches

The scale of her map is 1 inch = 20 miles

Then the original distance between Greenville and north valley

Since, the scale on Krystal's map is 1 inch=18 miles.

Then the distance from Greenville to north valley on Krystal's map

Hence, on Krystal's map Greenville and north valley are 5 inches apart.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6