Mathew invested $3000 into two accounts. One account paid 3% interest and the other paid 8% interest. He earned 4% interest on the total investment how much money did he put in each account??

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