You estimate that there are 40 marbles in a jar. The actual amount is 34 marbles. Find the percent error. Round to the nearest tenth of a percent if necessary.

25% increaseplus i think decrease i only know increase: ((

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.