Determine if the function is an exponential function.  
If so, identify the power & base, then evaluate for $x=4$.
$f\left(x\right)={\left(\frac{1}{2}\right)}^x$

Determine if the function is an exponential function.

If so, identify the power & base, then evaluate for $x=4$.

$f\left(x\right)={(-2)}^x$

Determine if the function is an exponential function.  

If so, identify the power & base, then evaluate for $x=4$.

$f\left(x\right)=3{\left(1.5\right)}^x$

Use a calculator to evaluate the following exponential expression. Round to two decimal places.

$7^{1.3}$

Use a calculator to evaluate the following exponential expression. Round to two decimal places.

$3^{\surd 6}$

Use a calculator to evaluate the following exponential expression. Round to two decimal places.

${13}^{\pi }$