Sustainable practices refer to the practices, services, and guidelines we develop to protect ourselves within our environment.

X= 49; x = 4step 1: foilstep 2: equal both to 0step 3: find x individually

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.