14.0147199674 is your answer. Hope this helps, if not, comment below please!

Converting to spherical coordinates, we have

On the other hand, we can parameterize the boundary of

by

with

and

. Now, consider the surface element



So we have the surface integral - which the divergence theorem says the above triple integral is equal to -


as required.
All triangles in this shape have same area as they have same base length and height length.
- area of triangle: 1/2 * base * height
Here the base is 4.2 cm and height is 2.5 cm for all the given triangles.
As a result, we can say that the area of
A,
B,
C are equal.
4^3
you can write it like 4 × 4 × 4
you can also call it "Four to the Third power".