PLEASE HELP! Every hour on hour, beginning at midnight, a mail truck leaves Winnipeg for Regina, and also a mail truck leaves Regina for Winnipeg. The distance between Winnipeg and Regina is 561km, and every truck averages 80km/h. The number of mail trucks that a mail truck leaving from Winnipeg at 5 am will meet on its trip to Regina is A) 13, B) 16, C) 14, D) 8, E) 7

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.