At the beginning of january, mr. howard gives his niece $1 to start a savings account, for each month that she can triple the amount in the account, mr. howard will double the amount in the account at the end of each month. how much does mr. howard's niece in her account at the beginning of may?

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