What is the missing length of the triangle?

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Icould really use some with this question.