. Dado el conjunto = {2; 3; {2}; ∅; {2; 3}; {∅}}, indique cuántas de las proposiciones siguientes son correctas:
. {2; 3} ∈
. ∅ ∈
. {∅} ⊂ ()
. {2; 3} ⊂
. {∅} ⊂
. {2; 3;{3}} ∈ ()

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?