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
Ivanshal [37]
2 years ago
11

A grade has 81 girls and 72 boys. The grade is split into groups that have the same ratio of girls to boys as the whole grade. H

ow many girls are in a group that has 16 boys?
Mathematics
1 answer:
Delicious77 [7]2 years ago
4 0
There will be 18 girls in a group of 16 boys.

you divide 72 by 16 and get 4.5.
then you divide 81 by 4.5 and get 18.

That is how you get 18 girls in a  group of 16 boys.

Hope that helped.
You might be interested in
Can someone plz help me with this plzz
vesna_86 [32]

Answer:

hi how are you wanna be friend

Step-by-step explanation:

6 0
2 years ago
Is it possible that the image of a point after a reflection could be the same point as the preimage?
Vera_Pavlovna [14]
Yes, it is possible. For example, let's say that point A is (0,4) and there's a reflection over the y-axis, then point A would still be (0,4).
3 0
3 years ago
Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the are
Nastasia [14]

Answer:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

z=\frac{0.36 -0.41}{\sqrt{\frac{0.41(1-0.41)}{100}}}=-1.017  

Step-by-step explanation:

Data given and notation

n=100 represent the random sample taken

\hat p=0.36 estimated proportion with the survey

p_o=0.41 is the value that we want to test

\alpha represent the significance level

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the true proportion is lower than 0.41.:  

Null hypothesis:p\geq 0.41  

Alternative hypothesis:p < 0.41  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.36 -0.41}{\sqrt{\frac{0.41(1-0.41)}{100}}}=-1.017  

8 0
3 years ago
Read 2 more answers
2 3/4 divided by 4 1/8
DochEvi [55]

Answer:

2/3

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Can someone please help me with this question?
Lina20 [59]

Answer:

402.12

Step-by-step explanation:

V=πr2h= π·42·8≈402.12386

7 0
2 years ago
Read 2 more answers
Other questions:
  • Plzzzzzzz Help I can’t figure it out
    12·1 answer
  • What is the answer to 16-2t = t + 9 + 4t <br><br>I need it now
    8·2 answers
  • Given the equation 5 + x - 12 = x - 7.
    11·1 answer
  • In the following diagram line C intersects line D. Using complete sentences, classify the relationship between &lt;7 and &lt;8 c
    9·1 answer
  • There are 5 people at a party. They decide to share 3 ice cream sandwiches equally.
    13·1 answer
  • What is it hurry I need this ASAP
    10·2 answers
  • Find the 13th term of the geometric sequence 5,10,20,...​
    11·2 answers
  • Jon rides his bike 5 miles in 40 minutes Paul rides his bike 8 miles in 40 minutes if they continue at this rate how far will ea
    6·1 answer
  • Write the expression as the sine, cosine, or tangent of an angle.
    7·1 answer
  • The data below shows the number of hours in a week twenty five teenagers spent watching ty. Their times, correct to the nearest
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!