Discover Questions

As a system analysts is it better to start with a decision tree and then construct a decision tree? (Or the other way around)? Why does: (-x)^2(12x^4)-(3x^3)^2 = 3x^6? Multiple numbers for percentage how to calculate? What is the last digit of 1⁵ + 2⁵ + 3⁵ + ... + 2012⁵ + 2013⁵? URGENTE !! AYUDENME NECESITO 8 SUMAS DE FRACCIONES QUE EL RESULTADO SE = 1 1/2?