## Algebra 2 (1st Edition)

$R_t=\frac{1}{\frac{1}{R_1}+\frac{1}{R_2}}=\frac{1}{\frac{R_2}{R_1R_2}+\frac{R_1}{R_1R_2}}=\frac{1}{\frac{R_1+R_2}{R_1R_2}}=\frac{R_1R_2}{R_1+R_2}$ Plugging in the given values we get: $R_t=\frac{(2000)(5600)}{2000+5600}\approx1473.7$