Let f(x) = cxe−x2 if x ≥ 0 and f(x) = 0 if x < 0. (a) For what value of c is f a probability density function?

(b) For that value of c, find P(1 < X < 3).

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.

two? xd

step-by-step explanation: