Answer
$vertical~rise=73.3~m$
Work Step by Step
The vertical rise is the opposite side of the right triangle. The distance of 3.5 kilometers is the hypotenuse.
$sin~1.2°=\frac{opp}{hyp}$
$sin~1.2°=\frac{vertical~rise}{3.5}$
$vertical~rise=3.5~sin~1.2°=0.0733~km$
$vertical~rise=73.3~m$
