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MariettaO [177]
3 years ago
8

Which plant can help remove pollutants in rivers and lakes?

Biology
1 answer:
SSSSS [86.1K]3 years ago
4 0
A plant called duckweed might be a viable option to remove phosphorus, nitrates, and heavy metals from rivers and lakes.
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A state is looking to reduce the cost of transportation, which uses 7.10×10^14 BTUs per year. Currently the cost of 10^6BTUs is
Ilia_Sergeevich [38]

Answer:

$ 284 million dollars

Explanation:

If the energy usage of all transportation is 7.10 × 10¹⁴ BTU per year, if their efficiency is to increase by 20%, The new energy usage will be (1 + 20/100)7.10 × 10¹⁴ BTU per year = (1.02)7.10 × 10¹⁴ BTU per year = 7.242 × 10¹⁴ BTU per year.

The energy saved is thus the difference 7.242 × 10¹⁴ BTU per year - 7.10 × 10¹⁴ BTU per year = 0.142 × 10¹⁴ BTU per year.

Since 10⁶ BTU costs $ 20.00, then,

0.142 × 10¹⁴ BTU costs 0.142 × 10¹⁴ BTU × $ 20.00/10⁶ BTU = $ 2.84 × 10⁸ per year = $ 284 million dollars

So the state saves $ 284 million dollars in one year

8 0
4 years ago
Sometimes, pregnant women are very emotional. This is believed to be caused by extra estrogen and progesterone that are released
Strike441 [17]

Activational effect is the correct answer.

Activational effect is an impermanent hormonal effect that leads to a change in physiological activity or behavior in both humans and adult animals. For instance, when testosterone levels rise in male songbirds they become more aggressive and tend to engage in courtship behavior. Also, a pregnant woman may get more emotional than usual due to an extra level of progesterone and estrogen during pregnancy.  

3 0
3 years ago
Which of the following events represents a disruption in access to the energy source needed by an organism?. . A. A weed is upro
Blababa [14]
Hello!
The best representation is "C. A cactus is moved from a sunny windowsill to a dark room..", because the cactus feed itself with photosyntesis.

Hugs!
8 0
3 years ago
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Rendon has been using xanax for a period of over six months. alex, his friend, asks him to stop using the drug as it adversely a
liubo4ka [24]

The reason of why Brendon experience immense physical pain and increased craving upon withdrawal because of physical dependence. Physical dependence is a physical condition that occurs after a gradual drug withdrawal in which the drug is being chronically used that upon withdrawal, it causes unpleasant symptoms, mainly, physical.

5 0
3 years ago
How often is co2 cycled through the atmosphere?
Klio2033 [76]
~Hello there! ^_^

Your question: How often is CO2 cycled through the atmosphere?


Your answer: CO2 is cycled through the atmosphere in 350 years.

Hope this helps~





8 0
3 years ago
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