If your going 80 miles per hour how much time would it take you to go 80 miles?

80 miles per hour 
answer

 it take you 1 hour to go 80 miles

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.