Aiden works at a garden center where he pots plants. it takes him 2 1/2 hours to pot 15 plants. how many plants can aiden pot in 1 hour? (i need . this is for 15 points. )

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236