Let and Suppose That Changes from to

Q84: Describe the level survaces of the function

Q85: Find the absolute extrema of the function

Q86: Find the dimensions of a rectangular box

Q87: Find the gradient of <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5971/.jpg" alt="Find

Q88: Use the Chain Rule to find <img

Q90: Find the critical points of the function.

Q91: Use partial derivatives to find the implicit

Q92: Find the first partial derivatives of the

Q93: Find the direction in which the function

Q94: Find an equation of the tangent plane