Simplify \(\left(\frac{16}{81}\right)^{-\frac{3}{4}}\times \sqrt{\frac{100}{81}}\)

Which of the following numbers is perfect cube?

If \(104_x = 68\), find the value of x

The ages of three men are in the ratio 3:4:5. If the difference between the ages of the oldest and youngest is 18 years, find the sum of the ages of the three men

Given that \(log_4 x = -3\), find x.