$a)10000=10\cdot 10\cdot 10\cdot 10={10}^4$

$b)0,01=\frac{1}{100}={10}^{-2}$ $b)0,01=\frac{1}{100}={10}^{-2}$

$c)0,0001=\frac{1}{10000}={10}^{-4}$

$d)0,000001=\frac{1}{1000000}={10}^{-6}$

$e)10000000={10}^7$

$f)0,000000001={10}^{-9}$