Un mapa de Perú esta construido a escala 12500000 ¿a cuantos kilómetros se encuentra dos ciudades que en el mapa están separados 10 cm

The percent increase is 25%

The difference is 5,100m?

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.