Determine whether each of these sets is countable or un- countable. for those that are countably infinite, exhibit a one-to-one correspondence between the set of positive integers and that set. a) integersnotdivisibleby3 b) integers divisible by 5 but not by 7 c) the real numbers with decimal representations con- sisting of all 1s

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

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protectionism fosters competition and keeps price regulated is not an argument in favor of protectionism.

answer; can each be concretely realized in different ways;