Blue river is 212 miles long. what is the length of the river on the map, if the scale is 1 inch : 50 miles?

4.24 inches
Explanation: divide 212 by 50

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.