Answer:
Pt 1: 
Pt 2: θ = 
Explanation:
Part 1:


imagine the "i"and the "j" with the hat




Part 2:




θ
θ
θ = 
Hope it helps
Answer is B. Longitudinal Wave
The answer is C.
they run east to west which makes them parallel to the equator and they measure distances north and south.
I hope this helps.
Mass in physics is in kg and mass in chemistry is in grams. Therefore a person's mass is kg
C. High-visibility clothing is important to wear in areas with moving vehicles