If he eeads the same rate for two hours how many pages will marcus read

That all depends 
it could be 300-700 pages depending on how many pages he reades in one minute...

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.