Just need the answer to the question in the picture, !

First thing to do is to switch the x and the y and then solve for the new y.  Easier said than done! Here's our equation with the switch: .  We need to get that y out from inside that exponent.  This is an exponential equation, and the inverse of an exponential equation is a log equation.  Let's do some simplifying here first: .  The 2 is now the base of our log (x-6) so now we have , which is the last choice above.

The lateral side of a triangular pyramid is a triangle. in order to increase the lateral surface area, the slant height and the height should be altered