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ddd [48]
3 years ago
9

The main reason that scientists would do a descriptive investigation is that _____. A. they don't like doing normal experiments

B. they can't make observations about their topic C. they're trying to make a significant new scientific discovery D. they're studying something for which they can't do an experiment
Chemistry
2 answers:
andre [41]3 years ago
8 0

Answer:

d) They're studying something for which they cant do an experiment

Explanation:

goblinko [34]3 years ago
8 0

Answer:

The correct answer is C. they're trying to make a significant new scientific discovery

Explanation:

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There are 50 fish in the pond that have tags. You catch 25 fish, and 5 of them have tags. What is the best estimate of the numbe
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Answer: 250


Explanation:


You work this problem by using proportions.


A proportion is the equalization of two ratios.


Here you assume that the ratio of fish with tags to total fish that you catch is the same than the ratio of fish with tags to total fish in the pond.


Mathematically:

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Solve for x:

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  • Division property of equality: x = 50 × 25 / 5
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Activation energy is the energy required by reactants to undergo chemical reaction and given products

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