Since we have a right triangle, we can relate the angle 28 with x and side 34 by meand of the sine function, that is,
where x is the hypotenuse. By moving x to the left hand side, we have
and by moving sin28 to the right hand side, we get
since sin28=0.4694, we have
then, x is given by
by rounding down, the answer is option D: x=72.4