During a snowstorm, the temperature drops from 0 degrees F to -7 degrees F in 7 hours. On average, by how many degrees is the temperature change per hour? (Will give brainliest for correct and most accurate answer.)

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.