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
nadezda [96]
3 years ago
11

If you add white and blue pain in ratio of 2:3 and make a mixture of 20litre,how much more blue paint will be added to make a ra

tio of 1:7?
Mathematics
1 answer:
vaieri [72.5K]3 years ago
7 0

Answer:

16litre

Step-by-step explanation:

You might be interested in
Matthew participates in a study that is looking at how confident students at SUNY Albany are. The mean score on the scale is 50.
Alex Ar [27]

Answer:

b) 6.68%

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

The mean score on the scale is 50. The distribution has a standard deviation of 10.

This means that \mu = 50, \sigma = 10

Matthew scores a 65. What percentage of people could be expected to score the same as Matthew or higher on this scale?

The proportion is 1 subtracted by the p-value of Z when X = 65. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{65 - 50}{10}

Z = 1.5

Z = 1.5 has a p-value of 0.9332.

1 - 0.9332 = 0.0668

0.0668*100% = 6.68%

So the correct answer is given by option b.

7 0
3 years ago
The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees. If we want to be 90% c
siniylev [52]

Answer:

19 beers must be sampled.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.9}{2} = 0.05

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.05 = 0.95, so Z = 1.645.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees.

This means that \sigma = 0.26

If we want to be 90% confident that the sample mean beer temperature is within 0.1 degrees of the true mean temperature, how many beers must we sample?

This is n for which M = 0.1. So

M = z\frac{\sigma}{\sqrt{n}}

0.1 = 1.645\frac{0.26}{\sqrt{n}}

0.1\sqrt{n} = 1.645*0.26

\sqrt{n} = \frac{1.645*0.26}{0.1}

(\sqrt{n})^2 = (\frac{1.645*0.26}{0.1})^2

n = 18.3

Rounding up:

19 beers must be sampled.

7 0
3 years ago
The variables x and y have a proportional relationship, and y=5/6 when x=3/4. Which equation represents this relationship?
seropon [69]

Answer:

y = 1 1/9

BRO MAKE ME THE BRAINLIEST PLS

4 0
2 years ago
Miko filled two tanks with water. The ratio of the amount of water in Tank A to Tank B is 3 : 2. The total amount of water in bo
Anna71 [15]

Step-by-step explanation:

answer is in the above picture

6 0
2 years ago
27/100 irrational or rational?
andriy [413]

Answer:

It would be a rational number.

Step-by-step explanation:

An easy way to tell if a number is rational is by seeing if it can be put in fraction form. As you can see, 27/100 is a fraction, so it is rational.

8 0
3 years ago
Other questions:
  • Your history teacher gives you a list of eight
    7·1 answer
  • A kilogram of whole-wheat flour costs $6. What is the cost of 400 grams of the flour
    5·1 answer
  • What is the value of x?
    8·1 answer
  • Rick traveled 23 of the way from his parents' house to his college dorm. He has driven 294 miles. What is the total distance bet
    9·1 answer
  • Expression of a number c divided by two
    7·1 answer
  • What is the area of the square of ? 3cm by 3 cm
    14·2 answers
  • Suppose a normal distribution has a mean of 62 and a standard deviation of
    15·2 answers
  • The area of a rectangular piece of land is 5/16 square mile. .
    9·1 answer
  • » What is the value of s?<br> S
    15·2 answers
  • Evaluate the expression for x = 2 and y = 4.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!