Help me with the step to this please I am trying to teach my daughter and I am completely lost!

Answer:
x ≈ 76.5 ft
Step-by-step explanation:
Assuming this is a right triangle, then
Using the sine ratio
sin40° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{x}{119}[/tex]
Multiply both sides by 119
119 × sin40° = x, thus
x ≈ 76.5 ft ( to the nearest tenth )