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
maxonik [38]
2 years ago
6

What percent of 21 is 7?

Mathematics
2 answers:
Marina86 [1]2 years ago
8 0
(7/21)*100=700/21=33.333
prohojiy [21]2 years ago
7 0
33 percent. 

7/21 = 0.3333333
You might be interested in
A researcher wishes to​ estimate, with 9090​% ​confidence, the proportion of adults who have​ high-speed Internet access. Her es
Sunny_sXe [5.5K]

Answer:  a) Required minimum sample size= 219

b) Required minimum sample size= 271

Step-by-step explanation:

As per given , we have

Margin of error : E= 5% =0.05

Critical z-value for 90% confidence interval : z_{\alpha/2}=1.645

a) Prior estimate of true proportion: p=28%=0.28

Formula to find the sample size :-

n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.28(1-0.28)(\dfrac{1.645}{0.05})^2\\\\=218.213856\approx219

Required minimum sample size= 219

b) If no estimate of true proportion is given , then we assume p= 0.5

Formula to find the sample size :-

n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.645}{0.05})^2\\\\=270.6025\approx271

Required minimum sample size= 271

8 0
2 years ago
Using the triangle below, find the length of side c if side a is 15 and θ =55. Round your answer to the nearest tenth.
Kaylis [27]

Answer:

15 sin 55 = 12

Step-by-step explanation:

It is a basic trigonometry formula

5 0
3 years ago
One eighth of a number is ten less than one third of the number. Find the number.
GarryVolchara [31]
X/8 - 10 = x/3

bring the values with the variable on one side

x/3 - x/8 = 10

find a common denominator and subtract these fractions

8x/24 - 3x/24 = -10

now subtract fractions

8x - 3x = 5x

5x/24 = -10

multiply both sides by 24

5x = -240

divide both sides by 5

x = -48

the number is -48
7 0
2 years ago
Read 2 more answers
How to reduce the fraction 10/63
mr_godi [17]
I'm pretty sure 10/63 is simplified.
6 0
3 years ago
Read 2 more answers
During an experiment, Juan rolled a six-sided number cube 18 times. The number two occurred four times. Juan claimed the experim
Maru [420]

Answer:

1) Juans claim is incorrect. The correct experimental probablilty is 2/9

Step-by-step explanation:

8 0
3 years ago
Read 3 more answers
Other questions:
  • Suzy randomly picks marbles from a bag containing 12 identical marbles. how many possible outcomes are there if she selects 6 ma
    7·1 answer
  • deborah's playlist on her mp3 player has a variety of songs she had 21 country 18 alternative 16 pop 18 rock use the bar diagram
    12·1 answer
  • A rectangular prism with a volume of
    15·1 answer
  • PLEASE HELP ME, IF CORRECTLY ANSWERED I’LL GIVE BRAINLIEST
    12·2 answers
  • -3(x - 1) + 8(x - 3) = 6x + 7 - 5x
    9·2 answers
  • Please help fast<br>I WILL MARK YOU AS BRAINLIEST ​
    15·1 answer
  • Help plz:))) I’ll mark u brainliest <br> ASAP!!!
    10·1 answer
  • A dilation maps point Q(1, 2) to its image Q’(2, 4). The completed figure Q’R’S’T’ is on the graph. What is the scale factor? En
    13·1 answer
  • What is the distance between 4,3 and 9,15 on the coordinate plane
    6·2 answers
  • Cubic
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!