The lower the price for purchasing a song from an online music store, the more times the song is downloaded. Let d=r(p) give the average number of daily downloads of a song as a function of the price of the song (in cents). Let p0 be the price currently being charged for the song (in cents). What does the statement p0⋅r(p0) tell you about the number of downloads from the store?     The average daily revenue of the music store if the current price is doubled.   The total number of times the song is downloaded at the current price.   The average revenue earned per download at the current price.   The average daily revenue of the music store from selling the song at the current price.   The total revenue of the music store when p0 songs are downloaded in a day.

The height of a hot air balloon, in feet, m minutes after takeoff is modeled by the function f(m) = 16m. b. Another balloon takes off 5 minutes later and rises at the same speed. Write an equation for the function g(m), where g is the height, in feet, of this balloon in terms of m. g (m) =

Determine whether the statement makes sense or does not make sense, and explain your reasoning : "My body temperature is a function of the time of day."

The owner of a local hair salon is planning to raise the price for a haircut and blow dry. The current rate is $30 for this service, with the salon averaging 550 clients a month. A survey indicates that the salon will lose 5 clients for every incremenetal price increase of $2.50. a. Write an equation to model the salon’s monthly revenue, R, in dollars, as a function of x, where x represents the number of $2.50 increases in price. b. Use the product rule to determine R’(x). c. Solve for R’(x) = 0.