We have to spent $13.01 less on unlimited streaming.
Given,
In one month rent 8 DVD's.
As per option a,
Rate of one DVD per night = $1.25
So for 8 DVD's for a night = 8 × 1.25 = $10
After one night returned 4 DVD's.
Now 4 DVD's left.
Rent of 4 DVD's for 4 nights = 4 × 4 × 1.25 = $20
Total amount spent in a month = $10 + $20 = $30
As per option c,
For unlimited streaming we have to spent $16.99 per month.
Amount difference = 30 - 16.99 = $13.01.
It is clear that we have to spent $13.01 less on unlimited streaming.
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