If the roots of the quadratic equation x2−kx+169=0 are equal, find the value of k.
\(\frac{9^{4}\times10^{3}\times4^{-4}\times16^{\frac{1}{2}}}{5^{6}\times3^{6}}\) equals :
\(\frac{1}{400}\)
\(\frac{4}{9000}\)
\(\frac{1}{9000}\)
\(\frac{9}{1000}\)
If 0.3̅72̅ = \( \frac{x}{y} \), where x and y are coprime, then what is the value of (x + y)?