Suppose Electrical Power P Is Given by , Where

Multiple Choice

Suppose electrical power P is given by , where E is voltage and R is resistance. Approximate the maximum percent error in calculating the power if 140 volts are applied to a 3000-ohm resistor and the possible percent errors in measuring E and R are 5% and 8%, respectively.

A) 24%
B) 42%
C) 38%
D) 43%
E) 18%