Answer:
90.3 km
Step-by-step explanation:
2 cm: 21 km and the boss provides 8.6 cm for manhattan-bronx distance.
a ratio can also be written as a fraction
2/21 x 8.6/x or 2:21 and 8.6:x [cross multiply to solve for x]
2 x 8.6 = 2x = 180.6 = 2x = 180.6 reduces to x =90.3
21 x 2 2