Assume That the Cities Lie on the Same North-South Line $43.15 ^ { \circ } \mathrm { N }$

Multiple Choice

Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km.
-Find the latitude of Spokane, WA if Spokane and Jordan Valley, OR, $43.15 ^ { \circ } \mathrm { N }$ , are $486 \mathrm {~km}$ apart.

A) $38.8 ^ { \circ } \mathrm { N }$
B) $39.5 ^ { \circ } \mathrm { N }$
C) $47.5 ^ { \circ } \mathrm { N }$
D) $52.46 ^ { \circ } \mathrm { N }$