Question $3$

$2$ pts

The table below shows the population of the United States at different points in history. Calculate the value that belongs in the cell marked with $"???"$ Show your calculations and indicate the units for your answer $($Millions$?$ Years? Millions per year?$).$

$\backslash$table$[[$Year$,\backslash$table$[[$Population$],[($millions$)]],\backslash$table$[[$Average rate$],[$of change$]],\backslash$table$[[$Growth rate$],[(\%)$