C = 7
thirty divided by 6 is five
so divide fortytwo by 6 is seven
Simplify the integrand:

Now integrate one term at a time.



Putting everything together,

Answer:
√27
Step-by-step explanation:
The triangles of the pyramid are equilateral triangles with sides of 6''.
Dividing a triangle into two equal parts we get two congruent right triangles, with a hypotenuse of 6'', one leg of 3'', and the other leg is the slant height (s). From Pythagorean theorem:
3² + s² = 6²
s² = 6² - 3²
s = √27
The variable s I equal to the number 2