How to determine a viewing window that completes a graph function

Find the zeros of the function. write the smaller solution first, and the larger solution second f(x)= (x+6)^2-49

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?

Find the domain and range of the following function f(x) = 51x - 21+ 4