1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
r-ruslan [8.4K]
2 years ago
5

Potassium-40 has a half-life of 1.3 billion years. If a rock was

Biology
2 answers:
Maksim231197 [3]2 years ago
5 0

Answer: The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.

pogonyaev2 years ago
3 0
The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.
You might be interested in
How do homologous structures provide evidence for evolution?
asambeis [7]
The presence of a homologous structure suggests common ancestry, and further suggests that the nearest common ancestor of two organisms had the trait which is homologous. Comparison of several modern organisms with different variations of the same homologous structure can suggest what the original ancestor's actual characteristics were, and comparison of the structure in different organisms can also suggest which organisms are more or less closely related
4 0
3 years ago
Help please please help​
mixas84 [53]

Answer:

b have a nice day!!!!

Explanation:

6 0
3 years ago
In allport's trait theory, the most common traits are _______ traits.
Law Incorporation [45]
<span>Central Traits
Central traits are ones that make up your personality. They are easily detected characteristics of a person. According to Allport, every person has around 5 to 10 central traits, and they are present in varying degrees in every person. These include common traits such as intelligent, shy, honest. They are responsible for shaping most of our behavior.</span>
7 0
3 years ago
an animals internal body structures can either be coelomate aceolmate or pseudocoelomate this means they may or may not have
Lera25 [3.4K]

They may not have a body cavity

4 0
3 years ago
One parent has curly hair,the other has straight hair and their child has wavy hair. This is an example of
liubo4ka [24]
<span>This may help...

This is an example of incomplete dominance, where the heterozygous condition has its own phenotype, in this case, pink. CA = white CB = Red CA CA CB CA CB CA CB CB CA CB CA CB CA CB = Pink CA CB CA CB CA CB CA CACA CA CB CB CA CB CBCB 25% will be white CACA, 25% will be red CBCB, and 50% will be pink CA CB.</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • In the United States, the parasite that causes malaria is not present, but it is present in African-Americans whose ancestors we
    10·1 answer
  • What is one question you have about the study of life? And remembering a good scientific question is concise, clear, and verifia
    13·1 answer
  • A galvanometer is a device that measures small currents.<br> a. True<br> b. False
    13·2 answers
  • Which Florida county is home to Cape Canaveral Air Force Station? Kennedy
    6·2 answers
  • Need HELP to explain this to my 10yr old!!
    13·1 answer
  • Which of the following structures is at the same level organization as the mitochondrion in a plant cell
    13·1 answer
  • What are the characteristics of prokaryotes?
    12·2 answers
  • In ooka and the honest thief why does gonta steal
    10·1 answer
  • With this concern in mind, you make plans to increase the stringency of the SSOPs, and develop containment plans to minimize cro
    15·1 answer
  • What chemicals are proteins?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!