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insens350 [35]
2 years ago
13

Which of the following is true about coral reefs?

Mathematics
2 answers:
sasho [114]2 years ago
5 0

Answer:

Predatory animals rely on reefs for food.

Step-by-step explanation:

More animals live there instead of open ocean so this answer makes the most sence.

Have a good day!

GarryVolchara [31]2 years ago
4 0

Answer:

Predatory animals rely on reefs for food.

Step-by-step explanation:

global warming make waters temp go up not down

dead reefs are gray which is a different color just an obvious example

the last two contradict each other and fish use them as home so fish that eat those fish will go towards the food not away

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How many ml of a 20% acid mixture and a 80% acid mixture should be mixed to get 120ml of a 35% acid mixture?
shutvik [7]

Answer:

Volume of Mixture A =90 ml

Volume of Mixture B =30 ml

Step-by-step explanation:

Let say, Mixture A + Mixture B = Mixture C

Volume of Mixture A is x

Volume of Mixture B is y

So, Volume of Mixture C is x+y = 120 ml

Now, Acid contain in Mixture A is 20% =0.2x

Acid contain in Mixture B is 80% =0.8y

Also, Acid contain in Mixture C is 35% =(0.35)(x+y) = 0.35×120=42

Now, we know that,

Acid contain of Mixture A + Acid contain of Mixture B=Acid contain of Mixture C

∴ 0.2x+0.8y=42

∴ 2x+8y=420

We get two linear equations

2x+8y=420 and x+y = 120

Solving above equation...

∴ x=120-y

Replacing x value in 2x+8y=420

∴ 2(120-y)+8y=420

∴ 240-2y+8y=420

∴ 6y=180

∴ y=30

Replacing y value in any equation

∴ x=120-y=120-30=90

∴ x=90

Thus,

Volume of Mixture A is x=90 ml

Volume of Mixture B is y=30 ml

3 0
3 years ago
1.6 × 10^6 ÷ 4.8 × 10^5. Give your answer as a mixed number​
Tasya [4]

Answer:

(10^11)/3

10^6 x 10^5 = 10^11

8/5 x 5/24 = 1/3

so multiply 10^11 and 1/3 together

6 0
2 years ago
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Aneli [31]
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