Find a unit normal vector to the surface  at the point

Find an equation of the tangent plane to the surface  at the point

Examine the function for relative extrema.​

The radius r and height h of a right circular cylinder are measured with possible errors of 6% and 2%, respectively. Approximate the maximum possible percent error in measuring the volume.  

23) What was the frost line of the solar system?

28) Why are methane clouds not seen on Jupiter and Saturn?

4) Comparing the different types of volcanoes (e.g., Hawaiian effusive volcanoes & Mt. St. Helens explosive volcano), why does the difference in the composition of the magma that fed these volcanoes determines the type of volcano?

15) Why Venus has no plate tectonics?

21) Why Jupiter has several distinct cloud layers?

5) According to one of the Milankovitch cycles, ice ages/glaciations on Earth are related to: