Sales

[nycmathguy]

Section 4.4

Let me see.

If t = 1 represents January 2017, then the following is true.

t = 6 represents June 2017

t = 12 January 2018 and t = 18 represents June 2018.

I must evaluate the function given at t = 1, t = 6, t = 12 and t = 18.

You say?

 

[MathLover1]

January 2017 to February 2017 => t=1
January 2017 to February 2017 =>t=13
January 2017 to June 2017 =>t=5
January 2017 to June 2018 =>t=17

 

[nycmathguy]

January 2017 to February 2017 => t=1
January 2017 to February 2017 =>t=13
January 2017 to June 2017 =>t=5
January 2017 to June 2018 =>t=17

Isn't June the middle of the year? This is why I selected 6 for June 2017. In any case, thank you so much for the correction. To learn math the right way, lots of mistakes is the name of the game. Now that I know what to do, I can change the month information and make up my own question from the original thread. Less questions per day leads to deeper discussions about the WHY AND HOW of solving math problems.

 

[MathLover1]

given: t = 1 represents January 2017

from January 2017 to February 2017 => t=1+1=2
January 2017 to to February 2018 =>t=12+1=13
January 2017 to June 2017 =>t=1+5=6
January 2017 to June 2018 =>t=12+6=18

 

[nycmathguy]

given: t = 1 represents January 2017

from January 2017 to February 2017 => t=1+1=2
January 2017 to to February 2018 =>t=12+1=13
January 2017 to June 2017 =>t=1+5=6
January 2017 to June 2018 =>t=12+6=18

I got it. I can now find the sales for any month of choice. Good questions.

Note: We are done with Section 4.4. We now move on the graphing sine and cosine functions. I want to practice this skill by hand. I know about Desmos but graphing by hand is an important part of any precalculus course.