X is greater than or equal to -5 and less than 0
1 answer:
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A.
from the question,
the total speed for the pedestrian is
40km and the total time is 10hr
substitute them in the formula, we get
speed = 4km/hr
B. 10hrs - 6hrs = 4hours
C. BC is deacceleration = -dv/dt
CD is constant acceleration = dt = 0