its 0 degrees outside at midnight the temperature of the air drops 20° in the morning hours then gains 3° as soon as the sun comes up what is the temperature after the Sun comes up

The answer is 41.7 because 1.39 times 30 is 41.7

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.