1750 < r < 2500
Step-by-step explanation:
Number of seats in theater = 250
Price per person = $10
Price per students or seniors = $7
For the minimum revenue = theater seats × Price per students or seniors
For the minimum revenue = 250 × 7
For the minimum revenue = $1750
For maximum revenue = theater seats × Price per person
For maximum revenue = 250 × 10
For maximum revenue = $2500
Hence, the possible revenue:
minimum revenue < r < maximum revenue
1750 < r < 2500