The proportion of pepperroni pizza orders on a randomly selected day at a local pizza shop is approximately normal with mean 0.30 and standard deviation 0.04.Let X = the proportion of pepperoni pizza orders on a randomly selected day.

Use the 68-95-99.7 rule to approximate:

a.P( X < 0.38 )

b.The probability that the proportion of pepperoni pizza orders is between 0.26 and 0.42.