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
djverab [1.8K]
3 years ago
10

A mixture of paint calls for 1/3 of a cup of red paint and 2/3 cups of yellow paint. How many cups of red paint would be needed

for every 1 cup of yellow paint?
Mathematics
1 answer:
garik1379 [7]3 years ago
3 0

Answer:

Step-by-step explanation:

You might be interested in
The quality control manager of a chemical company randomly sampled twenty 100-pound bags of fertilizer to estimate the variance
lisabon 2012 [21]

Answer:

The 95% confidence interval for the variance in the pounds of impurities would be 3.829 \leq \sigma^2 \leq 14.121.

Step-by-step explanation:

1) Data given and notation

s^2 =6.62 represent the sample variance

s=2.573 represent the sample standard deviation

\bar x represent the sample mean

n=20 the sample size

Confidence=95% or 0.95

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population mean or variance lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.

The Chi square distribution is the distribution of the sum of squared standard normal deviates .

2) Calculating the confidence interval

The confidence interval for the population variance is given by the following formula:

\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}

On this case the sample variance is given and for the sample deviation is just the square root of the sample variance.

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

df=n-1=20-1=19

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical values.  

The excel commands would be: "=CHISQ.INV(0.025,19)" "=CHISQ.INV(0.975,19)". so for this case the critical values are:

\chi^2_{\alpha/2}=32.852

\chi^2_{1- \alpha/2}=8.907

And replacing into the formula for the interval we got:

\frac{(19)(6.62)}{32.852} \leq \sigma^2 \frac{(19)(6.62)}{8.907}

3.829 \leq \sigma^2 \leq 14.121

So the 95% confidence interval for the variance in the pounds of impurities would be 3.829 \leq \sigma^2 \leq 14.121.

4 0
3 years ago
($5 for two work sheets) IF ANY ONE NEEDS HELP WITH ANY KIND OF WORK ILL DO IF FOR A BIT OF CASH I GRADUATED COLLEGE I KNOW WHAT
AnnZ [28]

Answer:   how much does an exam cost XD?

Step-by-step explanation:

5 0
2 years ago
Which is equivalent to sin-1(–0.4)? Round your answer to the nearest hundredth of a radian.
strojnjashka [21]

Answer:

-0.41 radians

Step-by-step explanation

(Credit goes to calculista)

let

A---> the angle

if sin A=-0.4

then 

A=sin-1(-0.4)

using a calculator

A=-23.578°----> the angle A belong to the IV quadrant

convert to radians

if pi radians--]----> 180°

x--------> -23.578°

x=-23.578*pi/180----> x=-0.41 radians

Read more on Brainly.com - brainly.com/question/9675799#readmore

4 0
3 years ago
Given f(x)=x^4-7x^3+6x^2+8x+9
posledela
The workings to the answers are in the attachments below. Open them up in a new window to see them in full.

Lowest Point On The Graph:

(4.480878208, -61.32441280)

Highest Point On The Graph:

(1.155422854, 17.23818241)

2nd Lowest Point On The Graph:

(-0.3863010618, 7.23076164)

8 0
3 years ago
Please HELP!!!!PLSLSLSLSS​
n200080 [17]

Answer: where is the question??

5 0
2 years ago
Read 2 more answers
Other questions:
  • 3/6(r-7)=1 what Is value of r
    7·1 answer
  • How do you get the answer and sketch it to this graft
    6·1 answer
  • Classify the triangle based on side lengths 5, 15, 19.
    9·2 answers
  • One-third of the dairy cattle on a farm are in the barn. Three-fifths of the beef cattle are in the barn. There are 30 dairy cat
    6·1 answer
  • Please help.<br> A<br> B<br> C<br> D
    15·1 answer
  • Please help me! Thank you!
    12·1 answer
  • A burrito chain offers a choice of pork, chicken, beef, or veggie burritos. Each burrito also comes with a choice of either rice
    13·1 answer
  • Which would be the correct answer!
    12·1 answer
  • Signals are digitized during transmissions over wireless networks. The chart lists possible features of digital communication.
    14·1 answer
  • The signals of a radio station can be received up to 80 miles away. Your house is 50 miles east and 20 miles south of the statio
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!