Two Harmonic Waves Are Described By $$y _ { 1 } = ( 3 \mathrm {~m} ) \sin \left( \frac { 4 } { m } x - \frac { 700 } { s } t \right)$$

Multiple Choice

Two harmonic waves are described by $$y _ { 1 } = ( 3 \mathrm {~m} ) \sin \left( \frac { 4 } { m } x - \frac { 700 } { s } t \right)$$ $$y _ { 2 } = ( 3 m ) \sin \left( \frac { 4 } { m } x - \frac { 700 } { s } t - 2 \right)$$ What is the amplitude of the resultant wave?

A) 8.0 m
B) 4.3 m
C) 6.0 m
D) 3.2 m
E) 3.0 m