Answer:
x ≈ 3.8
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos53° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{EF}{DF}[/tex] = [tex]\frac{x}{6.3}[/tex] ( multiply both sides by 6.3 )
6.3 × cos53° = x , then
x ≈ 3.8 ( to the nearest tenth )
