1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vlada [557]
3 years ago
8

Suppose that a chemist is mixing two acid​ solutions, one of 20​% concentration and the other of 30​% concentration. Which of th

e following concentrations could not be​ obtained?
1. 22​%,
2. 24​%,
3. 28​%,
4. 34​%
Mathematics
1 answer:
Pani-rosa [81]3 years ago
5 0

Answer:

4. 34%

Step-by-step explanation:

By mixing 20% and 30%, it will be between 20 and 30, like 22, 24 or 28. You would need a higher concentration than 30 to mix in to get 34%.

You might be interested in
What is the standard deviation of the following data set 1,1.2,4,1.28,4.1,5.3?
VikaD [51]
Memorize the definition of standard deviation: the sd is the square root of the average of the squared deviations of the mean. Wow. Let's do it.

Step 1. First we need the mean. That's easy. Add them up and divide by the count. Check if you get 16.88/5 = 2.81333.

Step 2. Now we're going to subtract this from each of the values, and square the result. Don't worry about negative signs, the squaring will get rid of those. Example for the first number:

(1 - 2.813)^2 = 3.29

The list of numbers I get is (rounded, in reality round as little as possible):

3.29, 2.60, 1.41, 2.35, 1.66, 6.18

Step 3: Add them all up. I get 17.49. 
Step 4: Divide by the count of numbers. 17.49/6 = 2.91
Step 5: Take the square root from this result. SQRT(2.91) = 1.707305

TIP: Use excel to do all these steps, then run the set of numbers through Excel's built-in sd function (called  STDEV.P) and see that you get the same result!
3 0
3 years ago
What is the prime factorization of 28 and 50?<br> Explain if possible.
dangina [55]

Answer:

prime factorization of 28

28 = 2 × 2 × 7

prime factorization of 50

50 = 2 × 5 × 5

Step-by-step explanation:

GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 2

3 0
2 years ago
Read 2 more answers
What exclusions are placed on the variable x for the fraction 4x^2-1/4x+2
aalyn [17]
Below are the choices:

<span>-1/2
0
 -1
 non
</span>
The  exclusions are placed on the variable x for the fraction 4x^2-1/4x+2 is -1/2. Below is the solution, 

<span>4x+2 = 0 so 4x=-2 so x=-2/4 wich is -1/2</span>
7 0
3 years ago
Read 2 more answers
15 points Please help!<br> What is the product? 4n/4n-4*n-1/n+1
jeka57 [31]
N/n+1
n-1/n-1=1
result is n/n+1
5 0
3 years ago
Last week, Chen bought 4 and 1/5 gallons of gas at $2.25 per gallon.
mamaluj [8]
$10.13

4 1/2=4.5
4.5x2.25=10.125
10.125 rounds to 10.13
6 0
3 years ago
Read 2 more answers
Other questions:
  • Drew has 50 red, green, and blue marbles. He has six more red marbles than blue marbles and four fewer green marbles tahn blue m
    8·1 answer
  • Given: -1/2x &gt; 6.<br><br> Choose the solution set.
    7·1 answer
  • What is the value of | -17 |, which is read, "the absolute value of 17"?
    9·1 answer
  • PLEASE ANSWER FAST.<br> The question is in the picture. <br> (question 24)
    9·1 answer
  • Each of the 25 student in mr mcdounld class sold 16 tickets if each ticket costs15$ how much money did the students raise
    8·1 answer
  • At a football match, there were 250 more men than women. The number of children was twice the number of women,and the number of
    10·1 answer
  • find the probability of drawing a diamond 8 through 10 on the first draw, replacing it, and drawing a black card on the second d
    7·1 answer
  • What kind of graph is this ?<br> A. Positive <br> B. Negative <br> C. Zero <br> D. Undefined
    11·2 answers
  • Tell me if its blurry
    14·1 answer
  • How would you answer 8 (4 + 2) im confused please help
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!