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Nitella [24]
2 years ago
11

You need a 75% alcohol solution. On hand, you have a 25 mL of a 10% alcohol mixture. You also have 80%

Mathematics
1 answer:
Ilya [14]2 years ago
8 0

Answer:

325 mL

Step-by-step explanation:

You will use all 25mL of the 10%, and you will add an amount of 80% solution that will result in a 75% solution.

We need to find the amount of 80% solution added that will produce a 75% alcohol solution.

Let the amount of 80% solution be x.

Amount of alcohol:

10% * 25 mL + 80% * x = 75% * (25 mL + x)

2.5 + 0.8x = 18.75 + 0.75x

0.05x = 16.25

x = 16.25/0.05

x = 325

Answer: 325 mL

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Mr. Sanchez’s class sold fruit pies for $1.73 each and Mr. Kelly’s class sold bottles of fruit juice for $1.44 each. Together, t
-Dominant- [34]

Answer:

p = 39       f = 44    

Step-by-step explanation:

p = $ 1.73

f = $ 1.44

<u><em>equation </em></u>

p + f = 83

1.73 p + 1.44 (83 - p) = $ 130.83

p = 39 (amount of times fruit pies were sold).

Therefore,

<em>p = 39</em>

<em>f = 44</em>

4 0
2 years ago
Find:P(large or blue)
siniylev [52]

Answer:

7/10

Step-by-step explanation:

Total number = 17+3+8+12 = 40

The ones that are large are 17 and 8

The ones that are blue are 17 and 3

Do not count the 17 twice

P(large or blue) = (17+3+8)/40

                          = 28/40

                         =7/10

7 0
3 years ago
NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6. In an earlier stud
SSSSS [86.1K]

Answer:

The large sample n = 190.44≅190

The  large  sample would be required in order to estimate the fraction of people who black out at 6 or more Gs at the 85% confidence level with an error of at most 0.04 is n = 190.44

<u>Step-by-step explanation</u>:

Given  population proportion was estimated to be 0.3

p = 0.3

Given maximum of error E = 0.04

we know that maximum error

M.E = \frac{Z_{\alpha } \sqrt{p(1-p)} }{\sqrt{n} }

The 85% confidence level z_{\alpha } = 1.44

\sqrt{n} = \frac{Z_{\alpha } \sqrt{p(1-p)} }{m.E}

\sqrt{n} = \frac{1.44X\sqrt{0.3(1-0.3} }{0.04}

now calculation , we get

√n=13.80

now squaring on both sides n = 190.44

large sample n = 190.44≅190

<u>Conclusion</u>:-

Hence The  large  sample would be required in order to estimate the fraction of people who black out at 6 or more Gs at the 85% confidence level with an error of at most 0.04 is n = 190.44

7 0
3 years ago
Which is a function and which one isn’t. please help me i need to get this done please help meh.
Anton [14]

Answer:

1) not a function

2) Function

3) Function

Step-by-step explanation:

3 0
3 years ago
What is the sum of the measures of the measures of the exterior angles of this triangle?
mylen [45]

Answer:

The sum of the exterior angles is 360 degrees.

7 0
3 years ago
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