Radioactive Decay Phosphorus$-32($P$-32)$ has a half$-$life of $14\mathrm{.}2$ days. If $400$ g of this substance are present initially, find the amount $Q(t)$ present after $t$ days. $($Round your growth constant to four decimal places.$)$

$Q(B)=$

What amount $($in grams$)$ will be left after $6\mathrm{.}4$ days? $($Round your answer to three decimal places.$)$

$9$

How fast $($in grams per day$)$ is the p$.32$ decaying when $t=6\mathrm{.}4?($Round your answer to three decimal places.$)$

$$ g$/$day