Problem 1E: Think About It Explain why z2=x+3y is not a function of x and y Problem 2E: Function of Two Variables What is a graph of a function of two variables? How is it interpreted... Problem 3E Problem 4E Problem 5E: Determining Whether an Equation Is a Function In Exercises 5-8, determine whether z is a function of... Problem 6E Problem 7E: Determining Whether an Equation Is a Function In Exercises 5-8, determine whether z is a function of... Problem 8E: Determining Whether an Equation Is a Function In Exercises 5-8, determine whether z is a function of... Problem 9E Problem 10E: Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the... Problem 11E Problem 12E Problem 13E: Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the... Problem 14E Problem 15E Problem 16E: Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the... Problem 17E: Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the... Problem 18E Problem 19E: Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the... Problem 20E Problem 21E Problem 22E Problem 23E: Finding the Domain and Range of a Function In Exercises 21-32, find the domain and range of the... Problem 24E Problem 25E Problem 26E Problem 27E Problem 28E Problem 29E: Finding the Domain and Range of a Function In Exercises 21-32, find the domain and range of the... Problem 30E Problem 31E: Finding the Domain and Range of a Function In Exercises 21-32, find the domain and range of the... Problem 32E Problem 33E Problem 34E Problem 35E Problem 36E Problem 37E Problem 38E Problem 39E Problem 40E Problem 41E Problem 42E Problem 43E Problem 44E: Graphing a Function Using Technology In Exercises 43-46, use a computer algebra system to graph the... Problem 45E Problem 46E Problem 47E Problem 48E Problem 49E Problem 50E Problem 51E Problem 52E Problem 53E Problem 54E Problem 55E: Sketching a Contour Map In Exercises 51-58, describe the level curves of the function. Sketch a... Problem 56E: Sketching a Contour Map In Exercises 51-58, describe the level curves of the function. Sketch a... Problem 57E: Sketching a Contour Map In Exercises 51-58, describe the level curves of the function. Sketch a... Problem 58E: Sketching a Contour Map In Exercises 51-58, describe the level curves of the function. Sketch a... Problem 59E Problem 60E: Sraphing Level Curves Using Technology In Exercises 59- 62, use a graphing utility to graph six... Problem 61E: Sraphing Level Curves Using Technology In Exercises 59- 62, use a graphing utility to graph six... Problem 62E: Sraphing Level Curves Using Technology In Exercises 59- 62, use a graphing utility to graph six... Problem 63E Problem 64E Problem 65E: Creating a FunctionConstruct a function whose level curves are lines passing through the origin. Problem 66E Problem 67E Problem 68E Problem 69E Problem 70E Problem 71E: Sketching a Level Surface In Exercises 71-76, describe and sketch the graph of the level surface... Problem 72E Problem 73E Problem 74E: Sketching a Level Surface In Exercises 71-76, describe and sketch the graph of the level surface... Problem 75E: Sketching a Level Surface In Exercises 71-76, describe and sketch the graph of the level surface... Problem 76E: Sketching a Level Surface In Exercises 71-76, describe and sketch the graph of the level surface... Problem 77E Problem 78E Problem 79E Problem 80E: Electric Potential The electric potential V at any point (x. y) is V(x,y)=525+x2+y2 Sketch the... Problem 81E Problem 82E Problem 83E Problem 84E: Cobb-Douglas Production FunctionShow that the Cobb-Douglas production function z=Cxay1a can be... Problem 85E: Ideal Gas Law According to the Ideal Gas Law. PV=kT " where P is pressure, V is volume, T is... Problem 86E: Modeling Data The table shows the net sales x (in billions of dollars), the total assets y (in... Problem 87E: Meteorology. Meteorologists measure the atmospheric pressure in millibars. From these observations,... Problem 88E: Acid Rain The acidity of rainwater is measured in units called p H. A pH of 7 is neutral, smaller... Problem 89E: Construction Cost A rectangular storage box with an open top has a length of x feet, a width of y... Problem 90E: HOW DO YOU SEE IT? The contour map of the Southern Hemisphere shown in the figure was computer... Problem 91E Problem 92E Problem 93E Problem 94E: True or False? In Exercises 91-94, determine whether the statement is true or false. If it is false,... Problem 95E format_list_bulleted