Adrawer is filled with 2 black shirts, 7 white shirts, and 11 gray shirts. one shirt is chosen at random from the drawer. find the probability that it is not a black shirt. write your answer as a fraction in simplest form.

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Find the area of the regular hexagon if a side is 20 cm.

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?