need help finding marginal profit

[mahethma]

when the admission price for a baseball game was $6 per ticket, 36,000 tickets were sold. When the price was raised to $7, only 33,000 tickets were sold. Assume that the demand function is linear and that the marginal and fixed cost for the ballpark owners are $0.20 and $85,000, respectively.
Find the profit as a function of x, the number of tickets sold. Then comment about the slopes of P when x=18,000 and x=36000. Lastly find the marginal profit when 18000 tickets are sold and when 36,000 tickets are sold.

 

[HallsofIvy]

when the admission price for a baseball game was $6 per ticket, 36,000 tickets were sold. When the price was raised to $7, only 33,000 tickets were sold. Assume that the demand function is linear and that the marginal and fixed cost for the ballpark owners are $0.20 and $85,000, respectively.
Find the profit as a function of x, the number of tickets sold. Then comment about the slopes of P when x=18,000 and x=36000. Lastly find the marginal profit when 18000 tickets are sold and when 36,000 tickets are sold.

I'm confused as to why you posted this. If you want help with it, then at least tell us what you know about it and where you are stuck.

"Assume the demand function is linear"- that means that you want the equation of the line through points (6, 36000) and (7, 33000). Do you know how to find the equation of that line. Or its slope?

If the fixed costs are $85000 and the marginal cost is $0.20, what is the cost equation? Do you know what "marginal cost" mean?

 

[mahethma]

I was able to figure out the marginal cost of what was given, but got lost when it came to finding the marginal revenue and without that i cannot find the marginal profit.