Which situation results in a final value of zero

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2