A 12 foot high pine tree cast a9 foot-long shadow at the same time that an oak tree casts a 45-foot long shadow. What is the height of the oak tree?

Need on this one asap im almost done with this subject

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?

What are the solutions of the equation? z^2 + 11z + 24 = 0 a. 8, -3 b. 8, 3 c. -8, -3 d. -8, 3