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By popular request, a place for you to discuss Maths of all forms. Somewhere to think about algorithms and the applications of maths to programming too.enTue, 28 Jun 2016 14:52:29 GMTvBulletin60http://www.vbforums.com/images/misc/rss.pngVBForums - Maths Forum
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Determine Number Based on Percentage
http://www.vbforums.com/showthread.php?831149-Determine-Number-Based-on-Percentage&goto=newpost
Tue, 21 Jun 2016 22:34:06 GMTI am an insurance sales guy and I need to determine how many quotes I need to give in order to write a certain amount of policies based on my close ratio, and I don't know how to calculate that. For example, if I have a close ratio of 9.6% how many quotes do I need to give in order to write 23 policies?

Edit - After some painstaking thinking... I think I may have got it.

You would convert the description to: 9.6% * X = 23
Then you would convert the equation to: 9.6 / 100 * X = 23
To get: 0.096 * X = 23
Then you would divide both sides by 0.096 to get: X = 239.58

So I would need to quote 240 people to write 23 policies.

Could someone confirm this?
]]>Maths Forumdday9http://www.vbforums.com/showthread.php?831149-Determine-Number-Based-on-Percentage<![CDATA[[RESOLVED] f(x) = A *cos(W*x) + b]]>
http://www.vbforums.com/showthread.php?830739-RESOLVED-f(x)-A-*cos(W*x)-b&goto=newpost
Wed, 15 Jun 2016 17:11:30 GMTGiven the generic cosine function in the subject, can the values of A,W and b be determined from only 2 points where;
P1 = {x1, y1} = {0, A+b}

For the second point W * x2 limited to between 0 and 90 degrees (i.e it is a angle in the first quadrant)
The points are on the curve like this

Now given there are 3 unknowns and only 2 points I'm not sure this is possible. But I also am not sure that there can be more than 1 set of A, W and b that would pass through both points (maybe though).

Because of the symmetry of the cosine function a 3rd point at {-x2, y2} is also known, but I'm not sure if the point can be considered independent or not.

I'm pretty sure I can figure this out by fitting a curve to it, but I'd like to find a mathematical solution.

So what say you? Can A, W and b be determined with only 2 points?
kevin