Which expression is equivalent to xy^2/9?

When only separate discreet points are graphed it is called?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.