Solve the problem.If f(x, y, z) is differentiable, x = r - s, y = s - t, and z = t - r, show that 
What will be an ideal response?
This follows from applying the chain rule.
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Solve the problem.The costs of one-way flights between several U.S. cities are listed below:
Using the Nearest Neighbor algorithm, estimate the minimum cost for a trip that starts in Des Moines, travels to all the other cities once, and then returns to Des Moines.
A. $720 B. $1072 C. $761 D. $816
Plot the indicated graphs.The electric power P (in W) in a certain battery as a function of the resistance R 
in the circuit is given by 
Plot P as a function of R on semilog graph paper.
What will be an ideal response?
Provide an appropriate response.
A fisherman wants to know the distance across a river. He sights a tree that he calls point A, and then walks down the river 40 feet at a ninety-degree angle. He then sights the same tree (point A) at an angle of 47°. How wide is the river? 
A. 27 ft B. 37 ft C. 43 ft D. 29 ft
Find the interest and maturity value for the loan. Round to the nearest cent.$4258 at 12.4% for 241 days (ordinary interest)
A. $347.17; $4605.17 B. $358.44; $4616.44 C. $353.46; $4611.46 D. $350.07; $4608.07