Question

Decomposition

Answer 1

\[A(t)=A_{0}e^{-kt}\]

Answer 2

I suck, i realize why it was hard lmao. I still don't know it though.

Answer 3

Sorry, erased the question.
It is found that 18 lb of A will reduce to 9 lb in 3.9 hr. How long will it be until only 1 lb left?

Answer 4

to find k, remember ln(2)/k=half life.

Answer 5

so the half life is 3.9; thus k=ln(2)/3.9

Answer 6

0.17773

Answer 7

So then now what? o.O

Answer 8

to find the time until 1/18 of the original amount is left, take ln(18)/k

Answer 9

16!

Answer 10

Jesus you're smart lol, thank god you're on here.

Answer 11

:)

Answer 12

This is my first chapter in calculus I straight up do not understand