Simplify

\(\frac {25^{\frac{2}{3}} \div  25^{\frac{1}{6}}} {(\frac{1}{5})^{\frac{7}{6}} \div (\frac{1}{5})^{\frac{1}{6}}}\)

Make T the subject of the relation.

What is the place value of 9 in the number 3.0492?

If the simple interest on a sum of money invested at 3% per annum for 2\(\frac{1}{2}\)  years is N123, find the principal.

A machine valued at N20,000 depreciates by 10% every year. What will be the value of the machine at the end of two years?