10. Two waves traveling in opposite directions interfere to produce a standing wave described by y = 3 sin(2x) cos (5t) where x is in m and t is in s. What is the wavelength of the interfering waves? (A) 3.14 m (B) 1.00 m (C) 2.00 m (D) 6.28 m (E) 12.00 m