Mathematics

Recent Answers

2013-05-23 Math and Science Solutions for - Finance question:

These calculations are very standard. A really good website that explains the relevant formulas is:     http://www.moneychimp.com/articles/finworks/fmbasinv.htm.    To help you along, your question a)

2013-05-23 Advanced Math - Level / Railroad Crossing Automated Systems.:

Almost all of the railroad crossing I have seen have a gate that swings down now as bells go off.  The bells start well before the train gets there (kind of like a yellow light), and then when the train

2013-05-22 Advanced Math - Plotting the intersection with a plane onto a flattened cylindar:

The equation of a circle is x²+y²=r² where (x,y) are the coordinates in a plane and   r is the radius of the circle.    Take this circle in the x-y plane and lift it so that only y lifts,  leaving x the

2013-05-22 Advanced Math - Level / Railroad Crossing Automated Systems.:

Of course, if the program for opening the gates is checked out.  When something is automated and all of the bugs are worked out, it is always right.  When a person is asked to do something, there are errors

2013-05-21 Algebra - Algebra Question B.5.4:

The standard equation is (y-k)^2 = 4a(x-h) where (h,k) is the vertex.  The distance from the vertex to the focus is "a" and that's also the distance from the vertex to the directrix.  So in this case,