the length of a snake is 280 cm, rounded to the nearest 10cm what is the lower bound of the length of the snake what is the upper bound of the length of the snake

For the first question the answer is a, for the second c, for the third d, for the 4th b, for the 5th a

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.