IWILL GIVE YOU BRANLIEST IF YOU ANSWER BY 11:10 A shipment of 20 compact disc players contain four defective units. A retail outlet ordered five of these units, and because all are packaged identically, the selection will be random. What is the probability that...(round decimals to three places)
a) All five units are good?
b) Exactly four units are good?
c) AT LEAST one unit is good?

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?

Which of the following circles have their centers in the third quadrant? check all that apply.

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?