An environmentalist wants to find out the fraction of oil tankers that have spills each month. Step 2 of 2: Suppose a sample of 669 tankers is drawn. Of these ships, 496 did not have spills. Using the data, construct the 98 % confidence interval for the
population proportion of oil tankers that have spills each month. Round your answers to three decimal places.

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.