Final answer:
Plan A is less expensive than Plan B when n > 4.
Step-by-step explanation:
To determine when Plan A is less expensive than Plan B, we need to compare the costs of both plans based on the number of videos viewed. Plan A charges a flat rate of $8 per month, plus $3 per video viewed. Plan B, on the other hand, charges $5 per video viewed with no additional flat rate. Let's assume 'n' represents the number of videos viewed in a month.
For Plan A, the cost is $8 + $3n. For Plan B, the cost is $5n. Plan A will be less expensive than Plan B when the cost of Plan A, $8 + $3n, is less than the cost of Plan B, $5n. So, we can set up the inequality: 8 + 3n < 5n.
Simplifying the inequality: 8 < 2n. Dividing both sides by 2, we get 4 < n, which can be written as n > 4. Therefore, the correct answer is A. n > 4.