At midnight, the temperature was -8°F. At noon, the temperature was 23°F. which expression represents the increase in the temperature? A. -8 – 23
B. |-8| – 23
C. -8 – |23|
D. |-8 – 23|

Is this from 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.