Aron has a bag of marbles that contains three red (r) marbles, four green (g) marbles, and three blue (b) marbles. which expression represents the probability of randomly selecting a green (g) marble, replacing it, and then randomly selecting a red (r) marble?

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.