answer questions

Author: brownsarahm

_toc.yml

@@ -36,6 +36,8 @@ parts:
       - file: notes/2023-11-07
       - file: notes/2023-11-09
       - file: notes/2023-11-14
+      - file: notes/2023-11-16
+      - file: notes/2023-11-21
   - caption: Activities
     chapters:
     - file: activities/kwl

notes/2023-11-21.md

@@ -503,4 +503,51 @@ this confirms that the approximation we found is the same as the float represent
 
 ## Experience Report Evidence
 
-## Questions After Today's Class 
+## Questions After Today's Class 
+
+
+### Why can't systems just interpret decimal numbers like humans can?
+
+
+Because it has to be represented mechanically or electrically for it to be a machine. 
+
+
+### My question is how bad can the approximations get when calculating floats? How much precision gets lost when dealing with fractional numbers?
+
+The quality of the approximation varies depending on the particular number. 
+
+
+At the bottom of 
+[float exposed](https://float.exposed/0x3ff0000000000000) you can see how close the next value is. 
+
+For 1 (the link above) the next number is a little more than 2.22e-16 away. 
+
+For [1532.625](https://float.exposed/0x44bf9400) the next value is  1.22e-4 away. 
+
+For [4503599627370497.0](https://float.exposed/0x4330000000000001)  to [9007199254740991.0](https://float.exposed/0x433fffffffffffff)the next value is 1.0 away, that is we can only represent integers between those two values, nothing in between. 
+
+
+### Did the people that came from an academia background typically design and implement these low-level systems or people in industry?
+
+A lot of this work was deep collaborations between academia and industry.  Some of it occured in universities, some of it was at places like  Bell Laboratory. That was a research instittue inside of the for profit Bell Telephone Company. 
+
+
+### How can I practice what we learned today for better understanding? 
+
+This is a hard topic and it will come back up in CSC411.  
+
+Also, I recommend reading these notes carefully, and trying the float.exposed site. 
+
+### Does this process of going through all the bits increase in time with more bytes? Or is there a set number of bits?
+
+This standard is a fixed size of 64 bits, but ther are others with different numbers of bits. 
+
+
+### How different was the initial standard from the one that exists today?
+
+The initial standard defined fewer basic formats, more were introduced in 2008.  Official IEEE standards are not free so they're slightly harder to read easily.  
+
+### How are we able to assign 0.1 to a variable despite that?
+
+
+We do not actually get a .1 for doing math.  It is close, but not exact.  Unless your programming environment has a different base type.