Which set of models will result in a sum of 2/3?

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

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 all the angles that satisfy the equation cos(θ)=32