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 20.0 gram sample of a certain radioisotope decays over a

Biology
1 answer:
VLD [36.1K]3 years ago
5 0

quantity of the substance remaining = initial quantity of the substance * (.5)^(time elapsed/half life of the substance)

2.50 = 20 * (.5)^(19.2/x)

You might be interested in
A person suffering from retrograde amnesia will
ololo11 [35]

lose past memories and the ability to acquire new

memories will remain unaffected.

7 0
2 years ago
Number 12 PLS ASAP PLS
valkas [14]
The answer is H. He is mechanically digesting his food.
6 0
3 years ago
Read 2 more answers
This invention made amputation much safer, which cut down on the number of people who died during the procedure
DENIUS [597]

The correct answer is:  a tourniquet.

The tourniquets are tight straps around an arm or leg and tightened to stop bleeding, used to control arterial and venous blood flow. In the past, tourniquet are used to control bleeding during amputations. Now,  a tourniquet is used in surgeries to block arterial blood flow following and to minimize blood loss.


3 0
3 years ago
What do you think a phenomena is
Sophie [7]
A phenomenon, in the scientific context, is an observable event that can range from a seasonal hazard to a technological issue. For a scientist, a phenomenon is an observable event.
4 0
3 years ago
What other kinds of cues might be reliable indicators for predator presence?
jarptica [38.1K]
<span>There are many indicators for predator presence. Some of them are:
Being able to spot predator marks like scratches or fur.
Being able to feel predator movements.
</span><span>Echo-location </span>For example, moths respond to the echo-location calls from their bat predators; moths drop to the ground once they hear the sound pulse from the bat.
8 0
3 years ago
Read 2 more answers
Other questions:
  • The elephant has 56 chromosomes in its body cells. when the elephant's body cells divide by mitosis, how many chromosomes will e
    5·1 answer
  • What is a natural levee
    9·2 answers
  • In fruit flies, L = long wings and I = short wings. When a long winged fly is crossed with a short winged fly, the off spring ex
    10·1 answer
  • A product is the starting materials of a chemical reaction, true or false?
    11·2 answers
  • Any easy way to remember about different tissues?? ...?
    10·1 answer
  • What is thought to have caused the mass extinction at the end of the Cretaceous Period?
    8·1 answer
  • Is Giardia viruses DNA or RNA viruses?
    5·1 answer
  • Х What is true of both photosynthesis and cellular respiration? O A Energy is created from wately O B. Anabolic reactions occur.
    12·1 answer
  • A cell’s rate of exchanging materials with the environment positively relates to its surface area-to-volume (SA/V) ratio. Cell s
    9·2 answers
  • A student drew the following model.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!