The correct answer is:  [A]:  " 8 √3 " .
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Note:
√192 = √64 * √3 = 8 √3 ; which is:  "Answer choice:  [A] ."
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Answer: X= 6 or X=-4
Step-by-step explanation:

 
        
             
        
        
        
PEMDAS
100 times 7 is 700
678 times 56 is 37968
700 +8 - 37968
-37260
        
             
        
        
        
Answer:
Zoom in and mark me as brainliest 
 
        
             
        
        
        
Given: In the given figure, there are two equilateral triangles having side 50 yards each and two sectors of radius (r) = 50 yards each with the sector angle θ = 120°
To Find: The length of the park's boundary to the nearest yard.
Calculation: 
The length of the park's boundary (P) = 2× side of equilateral triangle + 2 × length of the arc
or,                    (P) = 2× 50 yards + 2× (2πr) ( θ ÷360°)
or,                    (P) = 2× 50 yards + 2× (2×3.14× 50 yards) ( 120° ÷360°)
or,                    (P) = 100 yards + 2× (2×3.14× 50 yards) ( 120° ÷360°)
or,                    (P) = 100 yards + 209.33 yards
or,                    (P) = 309.33 yards ≈309 yards
Hence, the option D:309 yards is the correct option.