-3 divided by 1/6? pls

Let w=23 . what is the value of w + 45 ?

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

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis