Solve the problem.Let f(x,y) = ln (x2 + y2). Which one of the following curves is a simple closed path in the domain of the function f?
A. The unit circle x2 + y2 = 1
B. The unit circle (x - 5)2 + y2 = 1
C. The ellipse 
+ 
= 1
D. The rectangle with vertices at (-3, 2), (3, 2), (3, -2), and (-3, -2)
Answer: B
Mathematics
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Solve the problem.Let f(x,y) = ln (x2 + y2). Which one of the following curves is a simple closed path in the domain of the function f?
A. The unit circle x2 + y2 = 1
B. The unit circle (x - 5)2 + y2 = 1
C. The ellipse + = 1
D. The rectangle with vertices at (-3, 2), (3, 2), (3, -2), and (-3, -2)
Mathematics
Evaluate the expression.P(5, 0)
A. 120 B. 1 C. 0.5 D. 240
Mathematics
Evaluate.
+ 
+ . . . + 
A. 254 B. 128 C. 255 D. 256
Mathematics
Solve the problem.If a box measures 7.8 ft x 8 ft x 4 ft, find its volume.
A. 243.36 cu. ft B. 249.6 cu. ft C. 128 cu. ft D. 499.2 cu. ft
Mathematics