A=P(1/2)^(t/h)
A=final amount
P=initial amount
t=time
h=half life
so
h=1.3 billlion (just write 1.3 and remember to mulipy the end time by 1 billion)
and final amount is 25% of original or 0.25P
0.25P=P(1/2)^(t/1.3)
divide both sides by P
0.25=(1/2)^(t/1.3)
take ln of bot sides
ln(0.25)=ln((1/2)^(t/1.3))
property of logarithms
ln(0.25)=(t/1.3)ln(1/2)
divide both sides by ln(1/2)
(ln(0.25))/(ln(1/2))=t/1.3
times both sides by 1.3
(1.3ln(0.25))/(ln(1/2))=t
remember that this is billion so
(1,300,000,000ln(0.25))/(ln(1/2))=t
2600000000.0001=t
about 2.6 billion years
1 fill the beaker with water
2 check the amount you have
3 drop the marble in and subtract the original amount with the one you have now
A.
When you hear Metaphase think ‘middle phase’
The 3 types of muscle tissue<span> are cardiac, smooth, and skeletal.
Hope this helps. :)
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Answer:
A compass
Explanation:
A compass tells you which direction you are going whether that be North, East, South, or West. A map I'd a picture or drawing of a certain area.
