Solve the problem.For the surface z = f(x,y), show that the surface integral 
d? = 
dxdy.
What will be an ideal response?
Answers will vary. Let r = xi + y j + f(x, y)k. Then |ru×rv | = 
. The assertion follows.
Mathematics
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Determine whether the equation is linear or nonlinear.
= 9
A. linear B. nonlinear
Mathematics
Solve the problem.Data representing the price and quantity demanded for hand-held electronic organizers were analyzed every day for 15 days. The logarithmic function of best fit to the data was found to be 
Use this to predict the number of hand-held electronic organizers that would be demanded if the price were $275.
What will be an ideal response?
Mathematics
Prove the identity.cot 2 x + csc 2 x = 2 csc 2 x - 1
What will be an ideal response?
Mathematics
Find a formula for a n ?for the arithmetic sequence.
a 1 = –5, a 5 = 18
a. 
b. 
c. 
d. 
Mathematics