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slamgirl [31]
3 years ago
7

Arsenic is toxic to humans. The greatest amount of arsenic that is allowed in drinking water is 10 parts per billion. A test sho

ws that a source of drinking water contains 0.000002% arsenic. Is this an allowable amount? Explain.
Mathematics
1 answer:
Anna35 [415]3 years ago
3 0
The decimal you put would be “two ten-millionths” if read out loud. If the allowable amount is 10 parts per billion, it would be 1 part per 100 million. Because 2 parts per 10 million is also 20 parts per 100 million, it is not not an acceptable amount
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Look at picture (15 point)
NNADVOKAT [17]

Answer:

<h2>x \sqrt{2}</h2>

Option C is the correct option

Step by step explanation

\sqrt{ \frac{22 {x}^{6} }{11 {x}^{4} } }

Reduce the fraction with 11

\sqrt{ \frac{2 {x}^{6} }{ {x}^{4} } }

Simplify the expression

\sqrt{2 {x}^{6 - 4} }

\sqrt{2  \: {x}^{2} }

Simplify the radical expression

x \sqrt{2}

Hope this helps...

Good luck on your assignment..

3 0
3 years ago
In an arithmetic sequence, the 10th term is 37, and the 21st term is 4. Find the common difference and the first term
Masja [62]

Answer:

Common difference is 3. And the first term is 64.

Step-by-step explanation:

The differnce between 21 and 10 is 11. So there are 11 unknown numbers in between.  And the difference between 37 and 4 is 33. 33/11 is equal to 3. So the pattern is minus three. the first term is 9 terms before 37. 9 times 3 is 27. 37+27 is equal to 64. so the first term is 64

3 0
3 years ago
Which of the following best describes the change in the range when 13 is
svetoff [14.1K]
The answer is D). It increases by 13.
If you put the numbers in order from least to greatest.. 26,34,38,49,65,75,81
You will see the 26 is the smallest number and 81 in the highest number. The range between the two numbers is 55. To find the range you take the smallest number and subtract it from the biggest number. But when you add the number 13 to the problem then26 is no longer the smallest Number because 13 replaced it. So then you take 81 and subtract 13 from it and get 68. And then you take 55 and subtract it from 68 and come with 13. Which makes the answer D.
6 0
3 years ago
Solve the following system: y = x 3 4x y = 18 (6, 3) (3, 6) (â’3, 6) (3, â’6).
Nastasia [14]

The solution of the given equation is (3,6). The correct option is B.(3,6)

<h3>Given equations,</h3>

y=x+3.......(1)\\4x+y=18.....(2)

<h3>How to solve the equations?</h3>

putting the value of y from equation (1) in equation (2) , we get

4x+x+3=18\\5x=18-3\\5x=15\\x=3

substitute the value of x=3 in equation (1) we get,

y=3+3\\y=6

Hence, the solution of given equation is (3,6).

So, the correct option is B.

For more details about the system of equations, follow the link:

brainly.com/question/12895249

4 0
2 years ago
What’s 9x9cause I’m having troubles
photoshop1234 [79]

Answer: The answer is 81.

5 0
3 years ago
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