Respuesta :

AariniPadma
13.9. Use pythagoras theorem to find it. Square root of 12*2 + 7*2 = square root of 193 = 13.89 ~ 13.9

Answer:

[tex]\boxed{x=13.89\:km}[/tex]

Step-by-step explanation:

Pythagorean theorem

[tex]x^2=(12^2)+(7^2)[/tex]

[tex]x^2=144+49[/tex]

[tex]x^2=193[/tex]

[tex]x=\sqrt{193}[/tex]

[tex]\boxed{x=13.89\:km}[/tex]

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