Answer:
Explanation:
under colonial rule by Spain from the 16th century to the 19th century, and briefly by Great Britain during the 18th century (1763–1783) before becoming a territory of the United States in 1821.
Human-environment interactions is the intercations between the human social system and the ecosystem.
One example could be that the people in rural depends on the natural resources,such as the soil,land,and animals to farm,build facilities and hunt to sustain livelihood. Resources taken from the ecosystem are used, however one does not simply carry on like that. For instant when there is excessive cultivation, the soil nutrient would be used up causing soil erosion,leading to the soil no longer fertile enough to farm. Therefore,measures are carry out to preserve the land like growing different crops and using fertilizer.
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A radioactive element with a half-life of 1,000 years, and starting mass of 20 grams, will need 2,000 years to decrease to 5 grams.
Explanation:
The radioactive elements all have a specific half-life. Each element's half-life is well known, and they are used by scientists of numerous fields as they are excellent for determining the age of a particular item, be it or organic or non-organic nature. In this case, we have a radioactive element with a half-life of 1,000 years, and starting mass of 20 grams.
The half-life basically means that half of the mass of an element is lost during a particular period of time. For the element in question we need to find out how much time will be needed for it to decrease to 5 grams. In order to get to the result, we just need to add 1,000 years on every decrease of half of the mass:
20/2 = 10
10/2 = 5
So in 1,000 years, the element in question will decrease to 10 grams, and in further 1,000 years (2,000 cumulatively) it will decrease to 5 grams.
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Dividing a number by 2 always results in a smaller number.
A.
The number is 8.
(4)
B.
The number is 5.
(2.5)
C.
The number is 2.
(1)
D.
The number is 1.
(.5)
E.
The number is -1.
(-.5)
Ans I think it's the cylinder
Explanation:
