please help

Volume of a pyramid:

$V = {area{*height} \over 3}\frac{}{}$

Area of base = _{16 inches}

Height =

$h =\sqrt{4^2- ({(\sqrt{16+16})​​ \over 2})^2}{}_{}$

$h= {\sqrt{8}}$

Final formula:

$V= {1\over 3}* 16 * \sqrt{8}$

$V = 15.0849446653$

$V = 15.08$

Volume = 15.08