Answer:
5/14
Step-by-step explanation:
P(A or B) = P(A) + P(B) − P(A and B)
25/28 = 23/28 + 12/28 − P(A and B)
P(A and B) = 10/28
P(A and B) = 5/14
To answer this item, we use dimensional analysis and conversion factor, 1 revolution is equal to 2π rad. Using the concept and the given,
n = (14.2 revolutions / 8 seconds)(2π rad/1 rev)
n = 11.15 rad/s
Thus, the angular velocity is equal to 11.15 rad/s.
<span>It is also called order property of addition. This means that addends can be added in any order and the sum is always the same.</span>
