Activity 6: Classify Mel Direction: Tell whether the principal root of each number is rational or irrational. Explain your answer. The first problem has been solved for your guide. 1. V225 The radicand 225 is not a perfect cube. There is no number which when multiplied by itself three times gives 225. Therefore, it is irrational. 2. V625 3. 10000 4. V-111 5. 10.04​