Answer:
Can't answer this without knowing the height of the rectangle ...
Step-by-step explanation:
Hello!
The Answer Is 28.14
Because (42x33)/100=13.86
42.00-13.86=28.14
Answer:
The answer is D, 
Step-by-step explanation:
By graphing each one in a graphing tool like Desmos, you can determine which one it is.
If your looking for an actual explanation on how it is found, I can't really help you on that one.