What’s the correct answer for this question?

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

Use stokes' theorem to evaluate c f · dr where c is oriented counterclockwise as viewed from above. f(x, y, z) = xyi + 5zj + 7yk, c is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 81.