Answer:
(9,-4)
Explanation:
Without plotting it on a graph use Pythagorean theorem!
*Squaring a negative will make it positive!
For (3,4)
c = 5
For (-8,5)
c = 9.43
For (-9,1)
c = 9.06
For (9,-4)
c = 9.84
D. The United States
And that’s because every other country in the rest of the world uses Celsius temperature scale
The fact that the global ecosystems form broad latitudinal belts is mostly because of climatic reasons. It works very simply, the shape of the Earth doesn't allow the sun to heat up the surface equally in every place, so on the equator and around it the sun heats up the Earth the most, as the latitude changes the sun rays become weaker and weaker because they fall at a smaller angle and are dispersing much more, this forms the different climatic regions on Earth thus creating different ecosystems with it, ecosystems that have their borders mostly on the lines of change in climate from one region to another, so we mostly have latitudinal belts of ecosystems.
Answer:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
Explanation:
The amount of the sample of the radioactive isotope decays exponentially in time, the amount of mass of the sample as a function of time (
), in grams, is described below:
(1)
Where:
- Initial mass, in grams.
- Time, in years.
- Time constant, in years.
The time constant can be found from half life (
), in years, described in statement:
(2)
If we know that 
, 
and 
, then the current amount of the sample is:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
A narrow eastern coastal plain traversed by many river valleys and gently sloping to the ridges of the ancient Appalachian Mountains. Route of America.
The Appalachian Mountains are a range of mountains that run along the eastern coast of North America, from Newfoundland and Labrador in Canada in the north to Alabama in the United States in the south.
The area is rich in natural resources, but the population is often poor. In addition, declining education levels and lack of public infrastructure (highways, developed cities, businesses, medical services, etc.) are deteriorating the economic situation in the region. especially in remote mountainous areas. They have pitted men against each other in sprawling clans for decades, often using murder and arson as weapons, along with ambushes, gunfights, and prearranged firefights.
Learn more about Appalachians at
brainly.com/question/1621716
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