These teachers chose to study the population of all students in their classes. This approach is called a census. The U. S. government conducts a census every 10 years. List some things you know about the U. S. Census.

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.

Iwould say 48 bc the line of x is the line of 6 so 6×6=48