Bill Padley expects to invest $$6,000$ for $6$ years, after which he wants to receive $$8,040\mathrm{.}60.$ What rate of interest must Padley earn? $($PV of $$1,$ FV of $$1,$ PVA of $$1,$ and FVA of $$1)($Use appropriate factor$($s$)$ from the tables provided. Round "Table Factor" to $4$ decimal places.$)$

$\backslash$table$[[$Future Value,,Present Value,,Table Factor,Interest Rate$],[,,,=,,\%$