Hi, I am trying to find the Area but I cant tell if its 2D or 3D help please!

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

If the tip varies directly with the number of guest which equation represents between the tip, t, and the number of guest, g?

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%