Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
After an advertising campaign, the sales of a product often increase and then decrease. Suppose that t days after the end of the advertising the daily sales are,
f(t) =  6t^2 + 64t + 105 units.
a) What is the average rate of growth in sales during the fourth day that is from time t = 3 to t = 4.
b) In what instantaneous rate are the sales changing when t=3?
 one year ago
 one year ago
After an advertising campaign, the sales of a product often increase and then decrease. Suppose that t days after the end of the advertising the daily sales are, f(t) =  6t^2 + 64t + 105 units. a) What is the average rate of growth in sales during the fourth day that is from time t = 3 to t = 4. b) In what instantaneous rate are the sales changing when t=3?
 one year ago
 one year ago

This Question is Closed

SBest ResponseYou've already chosen the best response.0
For a do you take a derivative and then plug in 3 and 4 and find the difference or what ?
 one year ago

ChlorophyllBest ResponseYou've already chosen the best response.1
a) Avg = [ f (4)  f(3) ] / ( 4 3) = f (4)  f(3)
 one year ago

SBest ResponseYou've already chosen the best response.0
MMmm ok.. so just a difference with no derivative. Ok thanks! What about b?
 one year ago

ChlorophyllBest ResponseYou've already chosen the best response.1
b) instant rate = f' (3)
 one year ago

ChlorophyllBest ResponseYou've already chosen the best response.1
Thanks for helping me to make it so simple ;)
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.