Suppose that x and y vary inversely and that x=30 when y=2 1) write a function that models the inverse variation.
2) find x when y=12

Amanufacturer knows that their items have a normally distributed lifespan, with a mean if 9.1 years, and standard deviation of 2.9 years. if you randomly purchase one item, what is the probability it will last longer than 10 years?