Please help me with this.

Answer:
[tex]75\sqrt{2}(\sqrt{3}-1)[/tex]
Step-by-step explanation:
In every right triangle, a leg is given by the multiplication of the sine of its opposite angle and the hypothenuse.
In this case, the opposite angle of x is 15°, and the hypothenuse is 300. So, we have
[tex]x = 300\sin(15) = 75\sqrt{2}(\sqrt{3}-1)[/tex]