2 years ago

Please look at the attached image. Really need Help!! Who ever find answer first will get brainily.

Mathematics

2 answers:

FinnZ [79.3K]2 years ago

7 0

Answer:

The answer is...

Step-by-step explanation:

wait what is the options

Nitella [24]2 years ago

6 0

X is 90 degrees because there is a little square which indicates that it’s 90 degrees

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Radium-226 has a half-life of 1620 years. for a 150 gram sample, how many grams will remain after 200 years?

VashaNatasha [74]

Ah, yes

if you start with P amount of something and the half life is h units (in years) and the time elapsed is t (in years) then the amount left is A

the equation is
$A=P(\frac{1}{2})^\frac{t}{h}$

so
given
h=1620
P=150
t=200
so
$A=150(\frac{1}{2})^\frac{200}{1620}$
$A=150(\frac{1}{2})^\frac{10}{81}$
use your calculator
A≈137.69781917515g
about 138grams left

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cestrela7 [59]

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B

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