If we graphed both of these proportional relationships, the graph representing typing would be steeper than the graph representing
typing. So,
types more words per minute.

About 25of the grand parents will spend less than two hours a day online

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.