The level of a city's water reservoir was −12 3/4 inches relative to its normal level. after a rainfall, the level increased 3 1/4 inches. what was the level of the reservoir after the rainfall? enter your answer as a mixed number, in simplified form, in the box.

What are the choices

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.