41. In the figure below, a radar screen shows 2 ships. Ship A is located at a distance of 20 nautical miles and bearing 170°, and Ship B is located at a distance of 30 nautical miles and bearing 300°. Which of the following is an expression for the straight-line distance, in nautical miles, between the 2 ships?

(Note: For △ABC with side of length a opposite ∠A, side of length b opposite ∠B, and side of length c opposite ∠C, the law of cosines states c² = a² + b² - 2ab cos ∠C.)

A.

B.

C.

D.

E.