A merchant mixed 10 lb of a cinnamon tea with 3 lb of spice tea. The 13-pound mixture cost $34. A second mixture included 12 lb of the cinnamon tea and 14 lb of the spice tea. The 26-pound mixture cost $72. Find the cost per pound of the cinnamon tea and of the spice tea.

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?