Answer with Step-by-step explanation:
We are given that
The probability that an American CEO can transact business in foreign language=0.20
The probability than an American CEO can not transact business in foreign language=
Total number of American CEOs chosen=12
a. The probability that none can transact business in a foreign language=
Using binomial theorem 
The probability that none can transact business in a foreign language=
b.The probability that at least two can transact business in a foreign language=
c.The probability that all 12 can transact business in a foreign language=
The probability that all 12 can transact business in a foreign language=
One way is to graph it and do the vertical line test
it is not a function if we can draw a vertical line in the graph that passes through 2 points of the graph
if we graph this function, we see there is no place we can draw a vertical line and hit the line twice
Yes because you end up with 4,900 which is 70x70
Tell whether the set is closed under the operation indicated.<span>If not closed, provide a counterexample.
<span>1.) </span>integers under addition <span>2.) </span>integers under division
<span>3.) </span>whole numbers under subtraction 4.) Irrational numbers under addition
anser is open</span>