a charge q= 0.10 * 10^-6 c is located at position (0,0) cm. What is the magnitude of the electric field at location (30, 40) cm?
A. 18 N/C
B. 3600 N/C
C. 3.6 N/C
D. 7.2 * 10^6 N/C
E. 1.1 * 10^6 N/C