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2 years ago

What is pollution ????,

Mathematics

1 answer:

Reil [10]2 years ago

5 0

Answer:

Pollution is the introduction of harmful materials into the environment. Landfills collect garbage and other land pollution in a central location. ... They can also be created by human activity, such as trash or runoff produced by factories. Pollutants damage the quality of air, water, and land.

Step-by-step explanation:

hope this helps you!!

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I am so confused. Can anyone help me??

natita [175]

Answer:

bro! im in 7th grade i would try to help but im very stupid sorry for the dissopiontment

Step-by-step explanation:

8 0

2 years ago

An instructional video is 4.2 minutes long. How long is the video in seconds? How long is it in hours?

valkas [14]

First we convert it in seconds.

Number of seconds in 1 minute = 60 seconds
Therefore,
Number of seconds in 4.2 minutes = 4.2 x 60 = 252 seconds.

Next we convert it in hours.

60 minutes make up an hour. So we can write,
Number of hours in 60 minutes = 1 hour
Number of hours in 1 minute = 1/60 hour
Number of hours in 4.2 minutes = 1/60 x 4.2 = 0.07 hour

Therefore, the video is 252 seconds or 0.07 hour long.

5 0

3 years ago

Read 2 more answers

9+g+6g–3 a n s w e r p l e a s e

Alex_Xolod [135]

If you are being asked to simplify, just combine like terms; such as, all the g’s and all the numbers so, your answer should look something like: 7g+6

4 0

2 years ago

Read 2 more answers

Pls give me the full answer

nikdorinn [45]

All of the Questions are solved on the images shown below. These images are from Microsoft Whiteboard that I created.

<h2>I'm in sixth grade, and don't know how to answer 2 and 5. So I'm only going to answer questions 1, 3 and 4. </h2>

really sorry about that

1. Answer = 90m²

3. Answer = 50in²

4. Answer = 108cm²

yup, this is how weird i am

I took the screen shot of answer 3 before 1 lol!

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so sorry I couldn't help on all problems

Always have more than 2 smiles so that you can share them to someone who doesn't have one! Me Happy! You Happy! EVERYONE HAPPY!

Thanks!

Have a great day!

7 0

2 years ago

Find all solutions of the equation in the interval [0, 2pi).

natali 33 [55]

Answer:

Step-by-step explanation:

Begin by squaring both sides to get rid of the radical. Doing that gives you:

$sin^2x=1-cosx$

Now use the Pythagorean identity that says

$sin^2x =1-cos^2x$ and make the replacement:

$1-cos^2x=1-cosx$ . Now move everything over to one side of the equals sign and set it equal to 0 so you can factor:

$1-cos^2x+cosx-1=0$ and then simplify to

$cosx-cos^2x=0$

Factor out the common cos(x) to get

$cosx(1-cosx)=0$ and there you have your 2 trig equations:

cos(x) = 0 and 1 - cos(x) = 0

The first one is easy enough to solve. Look on the unit circle and see where, one time around, where the cos of an angle is equal to 0. That occurs at

$x=\frac{\pi }{2},\frac{3\pi}{2}$

The second equation simplifies to

cos(x) = 1

Again, look to the unit circle and find where the cos of an angle is equal to 1. That occurs at π only.

So, in the end, your 3 solutions are

$x=\frac{\pi}{2},\pi,\frac{3\pi}{2}$

8 0

3 years ago

What is pollution ????,​

What is pollution ????,