The electrical resistance R of a wire of unit length and cross-sectional radius x is given by R = , where K is a non-zero constant real number. By approximately what percentage does the resistance R change if the diameter of the wire is decreased by 6%?
A) -6%
B) -9%
C) 12%
D) 6%
E) -12%

Question

The electrical resistance R of a wire of unit length and cross-sectional radius x is given by R =  , where K is a non-zero constant real number. By approximately what percentage does the resistance R change if the diameter of the wire is decreased by 6%?
A) -6% 
B) -9% 
C) 12% 
D) 6% 
E) -12%

Quizplus · Accepted Answer

The Answer of The electrical resistance R of a wire of unit length and cross-sectional radius x is given by R =  , where K is a non-zero constant real number. By approximately what percentage does the resistance R change if the diameter of the wire is decreased by 6%?
A) -6% 
B) -9% 
C) 12% 
D) 6% 
E) -12%

The Electrical Resistance R of a Wire of Unit Length