The complete cycle of Moon phases takes 29.53 days.
The "First Quarter" has that name because it's one quarter of the time
from one New Moon until the next one.
So that's always close to (0.25 x 29.53) = 7.38 days ... essentially 1 week.
Answer:
the direction of resulting acceleration will Positive Direction
Answer:
0.859375c
31.03 seconds
Explanation:
v' = Velocity of my ship = 0.4 c
u = Velocity of rocket = 0.7 c
c = Speed of light = 
s = Distance between my ship and enemy ship = 
Relativistic addition of speed is given by

The speed of the missile is 0.859375c
Time is given by

It will take 31.03 seconds to reach me.