Answer:
The value at x =3 is undefined for the given expression
Step-by-step explanation:
Given expression is 
To find for what value of x is undefined in the given expression :



If we put x=3 in the above expression we get



Therefore 
The value at x =3 is undefined for the given expression
About 667 miles, by using the Pythagorean Theorem a^2 plus b^2 = c^2 the c in this equation if the distance so once u find it you end up with 667 miles