Let

using a graph tool
see the attached figure
The figure is a triangle
we know that
<u>The Heron's Formula</u> is a method for calculating the area of a triangle when you know the lengths of all three sides.
Hero's Formula is equal to

where
p is  is half the perimeter of the triangle
  a,b,c are the lengths of the sides of a triangle
so
Step 
<u>Find the length sides of the triangle</u>
a) <u>Find the distance AB</u>

Substitute


b) <u>Find the distance AC</u>

Substitute


c) <u>Find the distance BC</u>

Substitute


Step  
 
<u>Find the perimeter of the triangle</u>

<u>Find the half of the perimeter </u>

Step 
<u>Find the area of the triangle</u>



therefore
<u>the answer is the option </u>
a) 1.65 mi^2.
 
        
                    
             
        
        
        
Uhh... what are the options?
Here's some possible ones:
0.2
1/5
 
        
                    
             
        
        
        
Q = 16 
View the attached image for work!
 
        
        
        
Answer:
7/8
Step-by-step explanation:
7/16×2=7/16×2/1
           =14/16
           =7/8
 
        
             
        
        
        
Answer:
all real numbers 
Step-by-step explanation:
the domain will always be all real numbers