Given $V _ { 1 } = \frac { } { R _ { 1 } + R _ { 2 } }$

Multiple Choice

Given $V _ { 1 } = \frac { } { R _ { 1 } + R _ { 2 } }$ what is R2 if V1 =5V, Vt= 12V, and R1 = 10 kW?

A) $\frac { 2 8 } { 5 } \mathrm {~kW}$
B) 14 kW
C) kW
D) 34 kW