Which event is an example of vaporization? O A. People see their breath on a cold winter day.
OB. A spilled drop of rubbing alcohol slowly disappears.
O C. Dew forms on the leaves of a tree.
O D. Fog forms in a valley.

the answer is 3.1 his answer is wrong mines is right

the part of the wave he is travelling on is the crest

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west