Calculate the flux of the field F across the closed plane curve C.F = xi + yj; the curve C is the counterclockwise path around the circle x2 + y2 = 81
A. 324?
B. 18?
C. 162?
D. 0
Answer: C
Mathematics
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Use the laws of exponents to simplify. Do not use negative exponents in your answer.
A. 411 B. 211 C. 1 D. 27
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Graph the function.y =log2x
A. 
B. 
C. 
D. 
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Solve the system using Gaussian elimination.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics
The intensity I of a light a distance x meters beneath the surface of a lake decreases exponentially. If the light intensity at 6 meters is 76% of the intensity at the surface, at what depth (to the nearest tenth of a meter) will the intensity be 33%? ?
A. 24.2 meters B. 24.4 meters C. 25.1 meters D. 23.9 meters E. 24.8 meters
Mathematics