8. An online music store sells about 4000 songs each day when it charges $1 per
song. For each $.05 increase in price they sell about 80 fewer songs a day.
Develop a quadratic function to model this situation.
What should the store do maximize daily revenue?
Remember:
Revenue
(dollars)
:
=
sales
(songs)
price
(dollars/song)

Can someone me with my hwplz(only the circled ones)

Mason and christian go to the movie theater and purchase refreshments for their friends. mason spends a total of $45.75 on 3 bags of popcorn and 6 drinks. christian spends a total of $71.50 on 6 bags of popcorn and 4 drinks. write a system of equations that can be used to find the price of one bag of popcorn and the price of one drink. using these equations, determine and state the price of a drink, to the nearest cent.

Find the amplitude of a sinusoidal function that models this temperature variation