In 1998, Yahoo was the most popular search engine. IN 1999 and 2000, google was the most popular search engine. Then, in 2001, yahoo, and in 2002 and 2003, google.

If this was the pattern, (1 year yahoo, 2 years google) What would 1995, 1996 and 1997 be?

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.

Dcups i think