Respuesta :

gmany
Use the trigonometric function.

[tex]\cos53^o=\dfrac{18}{x}\\\\\cos53^o\approx0.6018\\\\\dfrac{18}{x}=0.6018\to0.6018x=18\ \ \ \ |:0,6018\\\\x\approx29.91[/tex]

Answer: D) 29.91