Answer:
There kind of needs to be more information. We don't have any other information other than the backstory. You're gonna need to elaborate.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
A, She added before multiplying.
Step-by-step explanation:
First, start off by using GEMDAS.
Grouping
Exponents
Multiply
Divide
Add
Subtract
You work from left to right - so you obviously divide first, which Amanda did successfully. Then, you multiply, which is exactly where Amanda went wrong. She was supposed to multiply before adding the 3 with 4. 
Not sure if this made sense,
 
        
             
        
        
        
Answer:
108°
Step-by-step explanation:
hii!
lmn would be equal to 85 plus 23. 
this is because those angles both make up the big angle lmn, so the answer is 108 degrees.
hope this helped you :)
 
        
             
        
        
        
Answer:
The shadow of the building = 192 ft.
Step-by-step explanation:
∵ There is a proportional relation between the heights of the tree and the building and their shadows
∴ Height tree/height building = shadow tree/shadow building

x =  = 192 ft ⇒ x is the length of the shadow of the building
= 192 ft ⇒ x is the length of the shadow of the building