Two resistors of resistance R_1 and R_2, with R_2>R_1, are connected to a voltage source with voltage V_0. When the resistors are connected in series, the current is I_s. When the resistors are connected in parallel, the current I_p from the source is equal to 10I_s.
Let r be the ratio of R_1/R_2.
Find r. Round your answer to the nearest thousandth.