Amap has a scale of 1 cm= 5 km. on the map, two cities are 3 cm apart. what is the actual distance between these cities?

3 cm. x 5 km.
= 15 km.

The actual distance between those cities is 15 km.

The answer is the third choice

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.