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
galben [10]
3 years ago
12

A scientist is studying a radioactive element that has a half-life of 63 years. Choose the correct answers from the drop-down me

nus to complete each statement about the element.
It will take
blank
years for half of the sample to decay.

In 189 years, blank
of the sample will be left.

Scientists can figure out how old a sample is by multiplying the blank
by the length of the half-life.
Biology
2 answers:
tatyana61 [14]3 years ago
7 0

Answer:

It will take 63 years

In 189 years, one-eight of the sample will be left

By multiplying the number of half-life cycles

Explanation:

LekaFEV [45]3 years ago
3 0

Answer:

It will take 63 years

In 189 years, one-eight of the sample will be left

By multiplying the number of half-life cycles

Explanation:

I just completed this assignment.

You might be interested in
This orgennelle is where proteins are made
valkas [14]
Ribosomes are the organelles of the cell which are involved in protein-synthesis (I. e. process of making proteins)
4 0
3 years ago
Joanna had a small ventricle septal defect (vsd) repaired when she was 3 years old and has no residual cardiac problems. she is
artcher [175]

In the given case, no antibiotic is needed for dental procedures.  

Based on the updated recommendations from the American Heart Association, there is no need to take a precautionary antibiotic prior to dental proceedings for the majority of people.  

It has been suggested by AHA that only those who are at greatest threat of bad consequences from infective endocarditis needs to get the short-term preventive antibiotics prior to routine dental approaches.  

It has been recommended by the AHA guidelines that various of the people who have taken preventive antibiotics in the past no longer need them, these include the individuals with the conditions, like mitral valve prolapse, ventricular septal defect, bicuspid valve disease, rheumatic heart disease, and others.  


8 0
4 years ago
how would you use the scientific method to answer this question: do mice live longer when they are fed high-sugar diets
Zielflug [23.3K]

Answer:

The question: Do mice live longer when they are fed high sugar diets?

Hypothesis: There are two hypothesis the null hypothesis which we assume is correct, it states that a high sugar diet will have no effect on the life span of a mouse and an alternate hypothesis that we accept if evidence shows that sugar does increase the life span if mice. It says a high sugar diet does incerease the life span of mice.

Prediction: Assume that the null hypothesis is correct. High sugar diets will not increase the life span of the mice.

Collect data through experimentation. Use some mice as a 'control'. These mice will not undergo any changes but will be kept for comparison. Expose some other mice to high sugar diets and the compare the outcome with the 'control' mice.  

Analyzing: From the experiment this you can choose which hypothesis you are going to accept. I.e. null: no change or alternate: there was a change and do some extra research to back up your hypothesis.

Hope this helps :)

8 0
3 years ago
Which of the following lymph nodes can be palpated when they're normal size?
lions [1.4K]
I believe the correct answer from the choices listed above is the last option. The lymph <span>nodes that can be palpated when they're normal size are </span><span> inguinal and popliteal. Hope this answers the question. Have a nice day.</span>
5 0
3 years ago
Read 2 more answers
Which of the following is not a parenting style? A. authoritarian B. disorganized C. authoritative D. permissive
kirill115 [55]
I think the answers is b bro 
3 0
3 years ago
Read 2 more answers
Other questions:
  • Why are the chips heavier?
    10·1 answer
  • 1.) ANALOGY -- Lithosphere: rigid as asthenosphere: ____________.
    7·2 answers
  • About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because _____. oxygen became available from cyanobacte
    11·1 answer
  • Describe one specific reason why scientists would want to maintain the genetic makeup of a particular plant?
    10·1 answer
  • Atoms contain Positively charged protons and negatively charged electrons. why doesn’t ordinary Atom have no charge?
    10·1 answer
  • In this type of tilling practice, the farmer
    11·1 answer
  • A host organism needs time, often days, to mount an immune response against a new antigen, but memory cells permit a rapid respo
    5·1 answer
  • Basic fibroblast growth factor binds to glycosaminoglycans in the extracellular matrix. Which amino acids would you expect to be
    7·1 answer
  • A computer model is a ________.
    6·2 answers
  • An eye or bud of a potato plant will grow a new potato if you plant it.<br> A.True<br> B.False
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!