Convert the following two numbers to standard notation:

$\displaystyle {8.5}\times{10}^{{3}}$ =

$\displaystyle {4.7}\times{10}^{{-{{4}}}}$ =

Convert the following two numbers to scientific notation:

$\displaystyle {150000}$ = $\displaystyle {a}\times{10}^{{b}}$     where $\displaystyle {a}=$ and $\displaystyle {b}=$

$\displaystyle {0.0031}$ = $\displaystyle {a}\times{10}^{{b}}$    where $\displaystyle {a}=$ and $\displaystyle {b}=$