A normal population has a mean of 20.0 and a standard deviation of 4.0. a. Compute the z value associated with 25.0. (Round your answer to 2 decimal places.)

How many people are we starting with? i will answer it's just i need to divide 8 by the total amount of people to get how many tables

Use a calculator basically

Idon’t know what the answer is i wish i could

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.