Kelsie works at a concert arena. When the price of a ticket is $30, a concert will be attended by 2,500 people. Each time the price is raised by an increment of $5, there will be 100 fewer people at the concert. Kelsie uses the equation R=(30+5n)(2500−100n)R=\left(30+5n\r ight)\left(2500-100n\right) R=(30+5n)(2500−100n) to determine R, the total concert revenue in dollars when there have been n $5 increases in ticket price. Which conclusion is valid? The total concert revenue decreases when the price of a ticket is greater than $30. The number of people attending the concert is represented by 2500-100n The number of times the price is raised is represented by 30+5n The cost per concert ticket must be less than $55.