Residents in a neighborhood determine the approximate number of dandelions in each yard. Then, they treat some yards with a weed-killing substance. The residents want to answer the question "About how many dandelions are in
your yard?" to determine the effectiveness of the weed killer. From which group would it be best to take a sample?
O all residents of the neighborhood
O only residents who had their yards treated with weed killer
only residents who did not have their yards treated with weed killer
O only residents who still have dandelions in their yards after treatment with weed killer
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1- 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. 2- 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. 3- 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 part b?