Answer in paper plz , thank you

7. For a local high school band, the demand for T-shirts is given by p =8-4Inx, ISx7, where x is the number of T-shirts (in hundreds) that can be sold during a single school year at a price of $p. If the shirts cost the band $1.50 each, how should they be priced in order to maximize the profit? 8. A restaurant is presently selling its veggie burger plate for $3.20. They sell 240 plates per day at this price. For every $0.20 decrease in the price, the restaurant can sell 30 more plates. What price should they charge to maximize revenue? 9. An orange grove is being planted. If the grove has 30 trees per acre then the average yield will be 400 oranges per tree. For each additional tree per acre the yield per tree will drop by 10 oranges. Find the number of trees per acre that should be planted to get the maximum yield per acre. 10. A daily newspaper is currently charging $16 per month and has 42,000 subscribers. For every $1 increase in the monthly price, the paper will lose 3,000 subscribers. a) What should they charge per month to maximize revenue? b) What is the maximum revenue? c) If the publisher has monthly fixed costs of $400,000 and each paper costs $6 per month to print, what should the newspaper charge per month to maximize profit? d) What is the maximum profit