Assume that the salaries of elementary school teachers in the United States have a mean of $32,000 and a standard deviation of $3000. If 100 teachers are randomly selected, determine the probability that their mean salary is greater than $32,500. 0.3312 0.9525 0.1312 0.0475 0.4338

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.