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
Setler79 [48]
3 years ago
15

Solving proportion 10\8=n\10

Mathematics
2 answers:
Zanzabum3 years ago
6 0
\frac { 10 }{ 8 } =\frac { n }{ 10 } \\ \\ 10\cdot \frac { 10 }{ 8 } =\frac { n }{ 10 } \cdot 10\\ \\ \frac { 100 }{ 8 } =n

\\ \\ n=\frac { 4\cdot 25 }{ 4\cdot 2 } \\ \\ \therefore \quad n=\frac { 25 }{ 2 }
Anna71 [15]3 years ago
6 0
\frac{10}{8}=\frac{n}{10} \\
\hbox{cross multiply:} \\
8n=10 \times 10 \\
8n=100 \\
n=\frac{100}{8} \\
n=\frac{25}{2} \\
n=12 \frac{1}{2}
You might be interested in
A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c
Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

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{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

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.

What is the minimum sample size required to create the specified confidence interval

This is n when M = 0.06, \sigma = 1.1

0.06 = 2.575*\frac{1.1}{\sqrt{n}}

0.06\sqrt{n} = 2.575*1.1

\sqrt{n} = \frac{2.575*1.1}{0.06}

(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}

n = 2228.6

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

7 0
3 years ago
WILL MARK BRAINLIST!!!!!<br><br> 4 |a| +8−a if a=−2
andre [41]

Answer:

18

Step-by-step explanation:

6 0
3 years ago
Identify the type of function represented by
SCORPION-xisa [38]
That's definitely an example of exponential decay, since the base (1/2) (also called the "common ratio") is greater than 0 but less than 1.
6 0
3 years ago
With 30l of milk, we can make 8.4kg of
Greeley [361]
To get from 8.4 to 10 in multiplication, we need to multiply 8.4 by 10/8.4

That means that if we multiply 30 by 10/8.4 we get the answer
which is 35,714

The same with the other
8.4 times 100/30 = 28
7 0
2 years ago
Find the measure of 0. (to the nearest tenth).<br> A) 36.9<br> B) 38.7<br> C) 51.3<br> D) 53.1
kupik [55]

Answer:

B) 38.7

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • in Math class we are Learning about Pi which equals 3.14 how do you find the diameter and radius i dont understand it can you gu
    7·1 answer
  • X-3<br>----- = -1 how do I solve this? <br>22
    12·1 answer
  • Laptop sold for $293 and u make 15% commission, how much commission did u make?
    10·1 answer
  • Sara created the poster shown below What would be the dimensions of the poster at times its current size with:32 lenth:28
    15·1 answer
  • Trigonometric functions
    10·1 answer
  • Complete the solution of the equation.find the value of y when x equals 20. -2x + 4y=-4
    7·2 answers
  • I need help plz <br><br> .........<br> .......<br> .......
    8·2 answers
  • Hypotheses: p=.5 vs p NE .5 ; Sample data: p=28/40= .70 with n=40 Round the p-value to three decimal places.
    7·1 answer
  • Solve x2 + 12x + 25 = 17 by completing the square. Select all the possible solutions.
    10·1 answer
  • Reba got home from school at 2:55 P.M. and played video games for 1 hour and 20 minutes. Then, it took her 1 hour and 35 minutes
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!