4.25.3 Can you answer these questions?

4.25.3.1 Cross-section of graph

https://mathematica.stackexchange.com/questions/148902/cross-section-of-graph

 
I am trying to use the following code to plot the cross-section of the graph z=x^2+y^2 and x=t. I use Manipulate to vary t. 
 
h = z - x^2 - y^2; 
g = x; 
Manipulate[ 
Show[ 
ContourPlot3D[{h == 0, g ==  ...
 

- asked by henryforever14 1vote

4.25.3.2 How to embed Mathematica or Wolfram Alpha results in a website

https://mathematica.stackexchange.com/questions/149063/how-to-embed-mathematica-or-wolfram-alpha-results-in-a-website

 
Is it possible to dynamically embed responses into a blog post? 
 
So the user would see: 
 
There are 390900 plant species in the world. 
 
With pseudo code: 
 
There are #{worlfram(number of plant species)}  ...
 

- asked by Mr. Demetrius Michael 1vote

4.25.3.3 Package MathWorld

https://mathematica.stackexchange.com/questions/148837/package-mathworld

 
I'm looking for MathWorld packages, but I can not find anywhere. I found an question that came very close but did not help me. 
 
I got lost on the site and did not find anything. 
 
I need to use the  ...
 

- asked by LCarvalho 4votes

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