Find the gradient of the given function at the indicated point. 
Definitions:
Hot Tub Water Heater
A device used specifically to heat the water in a hot tub to a comfortable and therapeutic temperature.
Selling Price
The amount of money for which a product or service is sold to the purchaser.
Halogen Lamp
A type of incandescent lamp that contains a small amount of halogen gas to increase light output and efficiency.
Markup Percent
The percentage added to the cost price of goods to cover overhead and profit, determining the selling price.
Q3: Compute the volume of the solid bounded
Q24: Determine if the function satisfies Rolle's Theorem
Q26: Find the vertices, foci, and directrices of
Q50: Find the gradient of the given function.
Q55: Given the graph of <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5869/.jpg" alt="Given
Q55: Evaluate <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5869/.jpg" alt="Evaluate ,
Q61: Determine whether the speed of the object
Q72: Find the mass and moments of inertia
Q99: Find the second-degree polynomial (of the form
Q105: Estimate the length of the curve <img