Expand the following number using exponents.

$6540.305$

Expand the following number using exponents.

$6523.450$

Simplify and express the following as single exponent.

$2^{-3}\times 2^{-2}$

Simplify and express the following as single exponent.

$7^{-2}\times 7^5$

Simplify and express the following as single exponent.

$3^4\times 3^{-5}$

Simplify and express the following as single exponent.

$7^5\times 7^{-4}\times 7^{-6}$

Simplify and express the following as single exponent.

$m^5\times m^{-10}$

Simplify and express the following as single exponent.

${\left(-5\right)}^{-3}\times {\left(-5\right)}^{-4}$

Express $4^{-3}$ in $\frac{p}{q}$ form