A model for the average number of cigarettes consumed per person, N, t years after 1900 is:
Use the model 5.9sin(2.81t+265)+6 to calculate for how many years during the twentieth century the average number of cigarettes smoked per person per day was below 6.
Does anyone have a clear method of how to do this?! Thanks!
- Thread Starter
- 20-05-2016 23:38
- Official Rep
- 23-05-2016 00:50
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Just quoting in Puddles the Monkey so she can move the thread if needed
Spoiler:Show(Original post by Puddles the Monkey)
- 23-05-2016 00:52
Find out when the number smoked per day is exactly 6.
Spoiler:Showset the function equal to 6 and solve
Once you have that, have a think about when it is below 6.
Spoiler:ShowDraw a graph for 1900 to 2000. Plot the years when it is 6 exactly, and roughly draw a sketch. You can test the number smoked per day between those years to figure out when it is less and when it is more. Now start counting the yearsLast edited by 1420787; 23-05-2016 at 00:54.