Final answer:
To purchase a $480 TV in 6 months, Mara needs to save $80 per month, which is the additional amount she must cut from her budget.
Step-by-step explanation:
To find out how much additional money Mara must cut each month to buy a $480 TV in 6 months, we need to divide the total cost of the TV by the number of months she has to save for it. This will give us the amount she needs to save each month. The calculation is as follows:
Total cost of TV / Number of months = Monthly savings needed
$480 / 6 months = $80 per month
Since the question asks for the additional money Mara must cut, and we've determined she needs to save $80 per month for the TV, the correct answer is (b) $80.