To model half-life, use the formula 
. Here, 
is the amount remaining after a length of time 
. 
is the amount that you start with. 
is the half-life. You plug in 50 for , 10 for , and 25 for . You get 
.
Which correctly describes a cross section of the square pyramid? Select three options. A square pyramid with 2 foot sides. A cro
2 answers:
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You can see 84.78 as .
So, you can see the problem as
First, multiply all the numerators together and all the denominators together.
You end up with
=33.912
