Question 303196
The horizontal distance between the center of the pyramid and Rowena is the same distance from the base of the pyramid to the where she is standing.

The tanget function tells us that in a right triangle the fraction formed is
opposite divided by adjacent.

We use the tangent function to find our distance.

Let x = horizontal distance between the center of the pyramid and Rowena.

tan(20) = 146.5/x 

x(tan(20)) = 146.5

x = 146.5/tan(20)

x is about 402.51 meters.