9(10 points). suppose that a is a nonempty set, and f is a function that has a as its domain. let r be the relation on a consisting of all ordered pairs (z, y) such that f(x) = f(y). (a) show that r is an equivalence relation on a (b) what are the equivalence classes of r?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?

I’m really confused and need to learn this