The total computer in 2014 was $716 and $739 in 2015. What was the percent change in computer cost from 2014 to 2015?

Idon’t exactly understand but i think dbc=rst

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.