At a high school, being a senior and being a sophomore are mutually exclusive events. The probability that a randomly selected student is a sophomore is 0.23. The probability that a randomly selected student is a senior is 0.21. What is the probability that a randomly selected student is a sophomore or a senior?

0.44

Step-by-step explanation:

The prob. that a senior or sophomore is selected is 0.23 + 0.21 = 0.44

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.

answer: 34rtyj,jkhtyetwrhyjeuiejnbhdfknbkguxfrbhkfdbjvkmbd,kvbsd.kxjvbhjnfbgjxdfn

step-by-step explanation: