The age of trees in a forest is known to be approximately normal with an average age of 40 years and a standard deviation of 10 years. About _ of the trees have ages between 10 years and 70 years.

What are the solutions of the equation? 6x^2 + 11x + 4 = 0 a. 4/3, 1/2 b. -4/3, -1/2 c. 4/3, -1/2 d. -4/3, 1/2

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq less than 132. the probability that a randomly selected adult has an iq less than 132 is?

Ranck the following in order from least precise to most precise