In a batch of 140 water purifiers, 28 were found to be defective. What is the probability that a water purifier chosen at random will be defective?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Explain how you divide powers with like bases.discuss why the bases have to be the same.how are these rules similar to the rules for multiplying powers with like bases.

Joanie watched 1 out of three of a movie in the morning