Who needs a gf any boys

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

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?