The equation for the pH of a substance is pH = -log(H'), where H+ is the concentration of hydrogen ions. Which equation
models the concentration of hydrogen ions (H+) of a solution whose pH is 7.2?
[H-] = log72
[H+] = -log7.2
[H"] = 10-72
[H*] = 1072

Given a normal distribution with µ =50 and σ =4, what is the probability that 5% of the values are less than what x values? between what two x values (symmetrically distributed around the mean) are 95 % of the values? instructions: show all your work as to how you have reached your answer. don’t simply state the results. show graphs where necessary.