Question

Please help! 10 points up^^

Answer 1

Use the sine:

$sine=\dfrac{opposite}{hypotenuse}$

$\sin18^o=\dfrac{x}{85}\\\\\sin18^o\approx0.309\\\\\dfrac{x}{85}=0.309\ \ \ \ |\cdot85\\\\\boxed{x=26.265\approx26.3}$

Answer: 26.3