On his computer, Gavin is working with a word processing program. In 4 minutes, he can key in 200 data items. Working at the same rate, how many
data items can Gavin enter in 12 minutes?

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?