I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wtjfavyw
Part A:
Electricity Company | Rate Charged | Rate Rounded |
Atlas Energy 12.065 12.070
Big City Light 9.138 9.140
Connex 9.143 9.140
Dynamon Power 9.707 9.710
ElectriCo 9.503 9.500
Part B:
Big City Light and Connex.
Part C:
Two companies can have the same rate when they are rounded because two numbers can be rounded to the same number although they are different numbers. For example; 9.138 and 9.143 can both be rounded to 9.140.
50 degrees
All triangles are 180 degrees, so you would set up an equation like this:
x+28+102=180
x+130=180
x=50
This is how you find x.
The fraction would be 10/3. Hope this helps!