All categories

3 years ago

When did pollution begin

Mathematics

2 answers:

Shtirlitz [24]3 years ago

6 0

Answer:

1780s to 1830s

Step-by-step explanation:

Pollution is not a new phenomenon. In fact, pollution has been a problem since the appearance of our earliest ancestors (Markham, 1994). Increasing human populations have opened the door to more bacteria and disease. During the Middle Ages, diseases such as cholera and typhoid fever broke out all across Europe.

Vinvika [58]3 years ago

6 0

Answer:

11,000 years ago.

Step-by-step explanation:

I pulled it from my notes!!!

You might be interested in

Multiply or divide as indicated.<br><br> x 2 • x 5

Alex Ar [27]

The answer is 10. Multiply x 2 by x 5. The x's cancel each other out witch leaves two times five witch is ten.

8 0

3 years ago

Read 2 more answers

What is 20 x 20 x 30 - 90 + 90 -187?

Romashka-Z-Leto [24]

Answer:

11,813

Step-by-step explanation:

PEMDAS

(20x20x30) - 90 + 90 -187 = 12,000

12,000 - 90 + 90 = 12,000

+ 90 and - 90 cancel each other out.

12,000 - 187 = 11,813

Hope this helps!

6 0

3 years ago

Read 2 more answers

Plz plz plzzzz help plz !!!

bixtya [17]

I think the last two are correct.
Hope it helps

8 0

3 years ago

Katrin is going to buy a new fridge.

nekit [7.7K]

I don"t use pounds or pence so this might not be right.
question 1--- she wouldn't have enough because everything would equal <span>£412.64.
question 2--- she would be incorrect because 1/6 of 38.60 is 6.43 and
38.60-6.43= 32.17 not 34.20.</span>

3 0

4 years ago

3x + 6y =3 x - y = -7 Does the system have: no solutions, infinite solutions, or one solution?

Serjik [45]

Answer:

One answer(see a pic attached)

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)

3 0

3 years ago