Orange paint has 2 cups of yellow paint for every 3 cups of red paint. According to the double number line, how many cups of yellow paint are required for every 15 cups of red?

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?