engineering economics: construct the cash flow diagram

Submitted by mayying on

A father wants to deposit an unknown lump-sum amount into an investment opportunity 2 years from now that is large enough to withdraw P4000 per year for state university tuition for 5 years starting 3 years from now.
•If the rate of return is estimated to be 15.5% per year, construct the cash flow diagram.

Spherical Zone with Manim

Jhun Vert
Partial spherical zone

The sphere is of radius 4 units, it is hardcoded to the parametric equations. The parametric equations are as follows:

  • $x = r \cos \theta \sin \varphi$
  • $y = r \cos \theta \cos \varphi$
  • $z = r \cos \varphi$

If you check the code, you can see that the latitude and longitude of the sphere are reoriented. The reason is for the sphere to fit the Manim's camera settings.

The orientation of the camera was done by trial and error until I found a view that I wanted.