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Doss [256]
1 year ago
14

Question 7 of 25 Which of the following best describes a community?

Biology
1 answer:
zepelin [54]1 year ago
3 0

Answer:

A - An interacting group of populations that occupy the same area.

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Potassium has a half-life of 12 hours. What fraction of a 100g sample is left after 48 hours
EastWind [94]

Answer:

After 48 hours amount left = 6.25 g

Explanation:

Given data:

Half life of potassium = 12 hours

Total mass = 100 g

Mass left after 48 hours = ?

Solution:

Number of half lives passed:

Number of half lives = Time elapsed / half life

Number of half lives = 48 hours/ 12 hours

Number of half lives = 4

At time zero = 100 g

At first half life = 100 g/ 2 = 50 g

At 2nd half life = 50 g/2 = 25 g

At 3rd half life = 25 g/2 = 12.5g

At 4th half life = 12.5 g/2 = 6.25 g

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Ethanol produced from bioenergy starts with starch produced by corn and sugar cane :)
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I lived on a small indonesian island around 18 kya. i used stone tools to hunt animals, but i had a very small cranial capacity
steposvetlana [31]

Answer:

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Explanation:

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Gross production is the amount of energy left after cellular respiration. Please select the best answer from the choices provide
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