Consider an electrical circuit comprising a battery with voltage V that provides a current I through a resistor network with resistor R1 in series with the parallel combination of R2 and R. Calculate the value of R if:
V = 4.80 x 10^1
I = 1.00 x 10^-1
R1 = 2.50 x 10^1
R2 = 5.00 x 10^2