Pls help

question below in image

Absolute error is always positive:

|25 -26.7| = |-1.7| = 1.7 ml

Percent error is:

1.7/26.7*100% = 6.4% (rounded)

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.