3) Each side of a regular octagon has a length of 20.6 cm, correct to thenearest millimetre. a) Write down the least possible length of each side.
b) Write down the greatest possible length of each side.
c) Write down the greatest possible perimeter of the octagon.
Please help!

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.

Ithink the answer may be -7 by when dividing both sides by -3