Two ships leave a port at the same time. The first ship sails on a bearing of 52° at 17 knots (nautical miles per hour), and the second on a bearing of 322° at 22 knots. How far apart are they after 2.5 hours? Round the answer to the nearest mile.
a) 70 nautical miles
b) 62 nautical miles
c) 85 nautical miles
d) 53 nautical miles