Solve for the unknown number of years in each of the following:

Note: Do not round intermediate calculations and round your answers to $2$ decimal

$\backslash$table$[[$Present Value,Years,Interest Rate,Future Value,$],[$$$,9,\%,$$$,1,855],[1,000,,7,\%,4,450],[2,691,,12,\%,394,620],[34,305,,19,\%,220,892],[34,000,,,,]]$