Let's denote the initial budget for the program as $6.5 billion and the annual cutback rate as 9% or 0.09.
We can write an expression for the amount budgeted (in dollars) for this program after n years as follows:
Budget after n years = $6.5 billion - (0.09 * $6.5 billion * n)
Alternatively, we can simplify the expression by factoring out $6.5 billion:
Budget after n years = $6.5 billion * (1 - 0.09n)
This expression represents the amount budgeted for the program after n years, taking into account the 9% cutback per year.