Describe The Situation In Which The Distance That Point X Is From 18 Is At Least

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A. Describe the situation in which the distance that point x is from 18 is at least 13 units. Express this using absolute value notation.    

B.   A machinist must produce a circular metal brace that is within 0.001 inches of the correct diameter of 6.5 inches. Using x as the diameter of the circular metal brace, give this statement using absolute value notation.