The scale on a map shows that 5 centimeters=2 kilometers.
part a
what number of cm on the map represents an actual distance of 5 km?
part b
what is the actual number of km that is represented by 2 cm on the map?

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.