Answer:
38m
Explanation:
You can get this by using trigonometric functions and in this case, we will use sine.
Sin(30) =

C =

C = 38m
Remember SOH CAH TOA
SOH
Sin(θ) =

CAH
Cos(θ) =

TOA
Tan(θ) =

You can use this for solving any of the sides given an angle and a side.
We used the SOH in this case because the side given is a or the OPPOSITE (the other side/across) of the angle given and you are looking for c which is the HYPOTENUSE.
We know that c is the hypotenuse because it is the side that is across the 90 degree angle (right angle).