Suppose that adult women in China have heights that are normally distributed with mean 155 centimeters and standard deviation 8 centimeters. Adult women in Japan have heights which are
normally distributed with mean 158 centimeters and standard deviation 6 centimeters. Which country
has the higher percentage of women taller than 167 centimeters?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

i believe it's a.

i'm not sure on this one, most likely correct.

good luck!