A survey made on 45 students for number of hours spent on watching TV in a week is recorded 8,4,7,10,12,15,10,9,8,7,12,14,16,5, 6,13,8,7,9,14,10,15,12,6,15,12,7,6, 9,10,6,15,14,10,4,9,8,10,7,4,8,7,13 ,6,18.
arrange the above data in ascending order:
(¡) how many students watch t. v for more then 15 hours a week
(¡¡) how many of them spend less then 6 hours a week on t. v

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.