Answer:
B
Explanation:
Give Brainlyist plsss
Which best explains the governance of the shaded areas shown on the map. With a map of American Indian reservations.
Answer:
These areas show where indigenous people have limited amount of self governance at a national scale
Explanation:
The areas depict how native groups have minimal self-government on a national scale, thus best explaining the administration of the colored areas depicted on the map.
The federal Indian reservation is indeed an area of land designated as a permanent tribal homeland by a treaty or even another arrangement with the United States. Its executive order, specific law, or administrative action, where the national government retains the claim to the property in trust for the tribe. The primary goals for Indian reservations were to put American Indians under the supervision of the U.S. government. It reduces violence between Indians and whites and encourages American Indians to embrace the white man's lifestyle.Learn more about American Indian reservations:
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You have 400 mg of a radioisotope with a half-life of 5 minutes. How much will be left after 30 minutes?
A 6.25mg
B 12.5 mg
C 100 mg
D 50 mg
You have 400 mg of a radioisotope with a half-life of 5 minutes. The time that will be left after 30 minutes is 6.25 mg. The correct option is A.
What are radioisotopes?The radioactive isotopes of an element are called radioisotopes. They can alternatively be described as atoms with surplus energy in their nucleus or unstable neutron-proton combinations.
A radionuclide is an unstable nuclide with too much nuclear energy. The extra energy can either be transferred to one of the nucleus' electrons to release it as a conversion electron, released from the nucleus as gamma radiation or used to build and emit a new particle from the nucleus.
Nuclear transmutations: natural radioactivity. Less than a hundred radioisotope types are recognized, yet there are more than a few thousand. Accelerators and Research Reactors for Man-Made Radioactive Isotopes.
If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Therefore, the correct option is A. 6.25 mg.
To learn more about radioisotopes, refer to the link:
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Suppose you have a 100 mg sample of Au-191, which has a half-life of 3.4 hours. How much will remain after 10.2 hours?
A 100 mg
B 50 mg
C 25 mg
D 12.5 mg
Which of the following statements explains the cost and distance relationship illustrated in the model in relation to the urban area's residential patterns?
A. Since land is more expensive in the suburbs wealthier families build larger single-family homes in zone five in areas that provide amenities such as private schools for their children
B. Land is cheaper near the central business district(CBD)resulting in the construction of low income apartments and giving low income residents access to the amenities of the CBD
C. The lower cost of land farther from the CBD makes it affordable to build single-family homes in zones 5 and 5 for a middle income and high income residents who desire to move into less crowded areas
D. People do not live in the CBD because of the traffic congestion, high cost of land, and lack of amenities such as museums and restaurants
E. Population density increases with the distance from the CBD and land prices decrease allowing residents of all income levels to move farther away from zone 2
Answer:
AP classroom said its C
Explanation:
trust me bro
Rachel is studying the causes, consequences, and treatments of mental illness. She samples 100 people diagnosed with generalized anxiety disorder. She provides each individual in her sample w
either a new untested drug, a placebo, or a nocebo (which occurs when a person expects negative side effects of a medication), Rachel measures sympathetic nervous system arousal a week bef
and a week after the study. The results of the study appear in the following graph.
70
Answer:
part a
random assignment ensured each participant had the same chance of being in each group so that means that the results can be more trusted as it leaves less room for data skews based on unfair grouping of participants.
the research method used was an experiment it was not effective, because as shown in the graph the results from the placebo and new drug are the the same so there was no affect on the levels of arousal with the new drug.
elements that limit the generalizability of her study include environmental factors of participants, length of time using drug, small sample size, and limited information about participants. these all affect the generalizability because each of these elements could vary greatly among test and especially in just a 100 person sample size it is hard to conclude that the results will be the same with people everywhere with GAD.
part b two physiological reactions she could have used are increased heart rate and blood pressure because these are typical signs of symptomatic nervous system arousal.
part c GABA blocks impulses between nerves in the brain cells and with general anxiety disorder there is lots of stimuli's and when GABA is taken it can help create a calming affect which reduces anxiety and helps people to relaxed rather than be anxious or on edge.
The relationship on the graph is showing that to have a good performance the optimal amount of arousal must be present because having too much arousal, like in many cases in which Rachel is studying, can cause anxiety and stress, and on the other side having not enough arousal can lead to consequences of not being able to sustain attention and lacks motivation.
Explanation:
CAUSES is a project determining the clinical impact of DNA sequencing for undiscovered diseases in British Columbia, and further observations are as follows:
Causes observation:Random allocation is the way of gathering people into groups based on randomness, intending to produce outcomes that can be attributed to experimental procedures and methodologies at the end of the trial.The research methodology is experimental research, which examines the cause-and-effect relationship and examines the effect of a psychoactive substance through pre-and post-testing. We can see from the graph that a certain drug has a negative effect, while the quasi drug group and placebo have the same effect.As a result, we can conclude that taking any medicine doesn't alleviate anxiety.Find out more information about the observation here:
brainly.com/question/9679245
What are the environmental impacts of climate change?
Answer:
There are so many.
Explanation:
Temperatures Rising,
More Droughts/Heat Waves,
Sea Levels Rising,
Ice Caps Melting,
More Endangered Animals
What is the file extension for PowerPoint and Word?