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
Vlad [161]
2 years ago
11

1.

Mathematics
2 answers:
OLEGan [10]2 years ago
6 0

Answer:

320\ g

Step-by-step explanation:

Start by setting up a ratio:

\frac{\text{amount of oats}}{\text{number of pancakes}}=\frac{\text{amount of oats}}{\text{number of pancakes}}

\frac{240g}{18\text{ pancakes}}=\frac{xg}{24\text{ pancakes}}

Cross multiply (Multiply the numerator of the first fraction by the denominator of the second and vice versa):

240*24=18*x\\5760=18x\\\text{Divide both sides by 18}\\x=320\ g

nikitadnepr [17]2 years ago
4 0

Answer: 320 g

Step-by-step explanation:

We can set up a ratio.

Let the amount of oats equal to x.

18/240 = 24/x

We can now cross multiply.

18x = 5760.

x = 320 g

You might be interested in
A softball pitcher has 0.626 probability of throwing a strike for each pitch if the softball pitcher throws 30 pitches what is t
coldgirl [10]
The probability that pitcher will throw no more than 16 strikes is 0.1938.
6 0
3 years ago
GRE Test: The Graduate Record Examination (GRE) is a test required for admission to many US graduate schools. Student’s scores o
Zepler [3.9K]

Answer:

a) \bar X=144.3

b) The 95% confidence interval would be given by (138.846;149.754)      

c) n=34

d) n=298

e) n=1190

Step-by-step explanation:

Previous concepts

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 means 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.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

We can calculate the sample mean with this formula:

\bar X = \frac{\sum_{i=1}^n x_i}{n}

\bar X=144.3 represent the sample mean  

\mu population mean (variable of interest)

\sigma=8.8 represent the population standard deviation

n=10 represent the sample size  

a) Find a point estimate of the population mean

We can calculate the sample mean with this formula:

\bar X = \frac{\sum_{i=1}^n x_i}{n}

\bar X=144.3

b) Construct a 95% confidence interval for the true mean score for this population.

The confidence interval for the mean is given by the following formula:

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

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 value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that t_{\alpha/2}=1.96

Now we have everything in order to replace into formula (1):

144.3-1.96\frac{8.8}{\sqrt{10}}=138.846    

144.3+1.96\frac{8.8}{\sqrt{10}}=149.754

So on this case the 95% confidence interval would be given by (138.846;149.754)    

Part c

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (a)

And on this case we have that ME =+20 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025;0;1)", and we got z_{\alpha/2}=1.960, replacing into formula (5) we got:

n=(\frac{1.960(8.8)}{3})^2 =33.05 \approx 34

So the answer for this case would be n=34 rounded up to the nearest integer

Part d

n=(\frac{1.960(8.8)}{1})^2 =297.493 \approx 298

So the answer for this case would be n=298 rounded up to the nearest integer

Part e

n=(\frac{1.960(8.8)}{0.5})^2 =1189.97 \approx 1190

So the answer for this case would be n=1190 rounded up to the nearest integer

7 0
3 years ago
First answer gets marked brainliest!!!
strojnjashka [21]

Answer:

in neighbourhood q the total number of people in the nine families I higher than that in neighbourhood s because of we add up the number of people in the families in neighbourhood q we get a total of 35 yet we have a total of only 27 people in the nine families in neighbourhood s

hope that helps ❤

3 0
3 years ago
Convert the following percent to a fraction and decimal. (THIS IS NOT MULTIPLE CHOICE!!)
Mkey [24]

Answer:

90%=9/10=0.9

0.9=90%=9/10

900%=900/1000=0.9

9/10%=0.9=90%

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
7a(3b-2c+4) simplify by distributing
luda_lava [24]
To simplify by distribution we proceed as follows;
7a(3b-2c+4)
=7a*3b-2c*7a+4*7a
=21ab-14cb+28a
the answer is:
21ab-14cb+28a
4 0
3 years ago
Other questions:
  • Solve the equation 42=7r r=​
    5·2 answers
  • The number of tickets Ben can buy to the baseball game depends on the price of the tickets, p. he can afford lickets that cos $5
    14·1 answer
  • 9(9t-4) &gt; 12(12t-3)<br>choosing brainliest
    12·1 answer
  • 2. Evaluate 11h - 6 for when h = 6.​
    5·1 answer
  • Solve the system of equations given below.
    7·2 answers
  • Please help this might be easy for some people but I’m just not smart
    11·1 answer
  • Joelle spent 1 1/2 hours studying for her science test. Rileigh studied 3/4 for of Joelle‛s time. What fraction of an hour did R
    11·1 answer
  • Please help the first one to answer the question gets brainlyest
    8·1 answer
  • If the 2 at last is an power in the solution of the equation then what will be the value of x?
    14·2 answers
  • Work out the size of angle x.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!