9.9.3 Can you answer these questions?

9.9.3.1 NIntegrate methods with region
9.9.3.2 3D Timeline of 2D Barcharts
9.9.3.3 Reducing arrowhead size in HighlightGraph network
9.9.3.1 NIntegrate methods with region

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=281831

%%%%%%%%%%%%%%%%%%%%% 
\cprotect\subsubsection{\verb|As of Mathematica version 10, one can integrate over regions|} 
\url{seehttps://www.wolfram.com/mathematica/new-in-10/symbolic-geometry/integrate-over-regions.html} 
 
\begin{TEXTWinline} 
As a toy example, I am using this from ... 
[numerical-integration] [regions]
 
asked by Lauren Pearce https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12026 Score of 1
answered by user64494 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7152 Score of 0
9.9.3.2 3D Timeline of 2D Barcharts

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=281789

This post may be related to this one : 3D plot based on combined 2D graphs 
Consider the following (big) dataset which represents some results at time t=1 : 
... 
[plotting] [graphics3d] [charts]
 
asked by Jocelyn Minini https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=69816 Score of 1
answered by demm https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=30122 Score of 0
9.9.3.3 Reducing arrowhead size in HighlightGraph network

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=281995

I have a two-dimensional dataset of company names and the type of business they do (retail, tech, food, etc.) 
When I do a HighlightGraph, the arrows are huge. Changing ImageSize has no effect.  I have ... 
[graphs-and-networks] [arrowhead]
 
asked by gotwals https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=22204 Score of 1
answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 Score of 0