<span>1. Which of the following is an ABIOTIC factor?
C. Rocks
2. What is an input of photosynthesis AND flows through the Carbon Cycle? *
B. Carbon Dioxide
3. Where is/can carbon be stored for long periods of time (longer than a lifetime)? *
A. In rocks
4. Where is carbon found?
D. All of the above
5. How are cellular respiration and photosynthesis related to the carbon cycle? (no multiple choice it's a written answer)
</span>in order to live, people and animals inhale oxygen and give out carbon dioxide. Carbon dioxide is taken by plants in a process called photosynthesis and it is used in the presence of <span>energy from sunlight to produce carbohydrates and oxygen. </span>
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
I think it’s A. The plasma membrane
