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
Lemur [1.5K]
3 years ago
13

Please help , I would sincerely appreciate it

Mathematics
1 answer:
kozerog [31]3 years ago
5 0

Answer:

B . S /2rh =pi

Step-by-step explanation:

S = 2* pi * r*h

We are solving for pi

Divide both sides by 2rh to isolate pi

S/ 2rh = 2 * pi *r* h / 2rh

S /2rh =pi

You might be interested in
PLEASE HELP ME I BEG I WILL GIVE BRAINLIEST
ohaa [14]

Answer:

Mean = (2.2 + 2.4 + 2.5 + 2.5 + 2.6 + 2.7)/6 = 2.48

Standard deviation = √(summation(x - mean)²/n

n = 6

Summation(x - mean)² = (2.2 - 2.48)^2 + (2.4 - 2.48)^2 + (2.5 - 2.48)^2 + (2.5 - 2.48)^2 + (2.6 - 2.48)^2 + (2.7 - 2.48)^2 = 0.1484

Standard deviation = √(0.1484/6

s = 0.16

Standard error = s/√n = 0.16/√6 = 0.065

Part B

Confidence interval is written as sample mean ± margin of error

Margin of error = z × s/√n

Since sample size is small and population standard deviation is unknown, z for 98% confidence level would be the t score from the student t distribution table. Degree of freedom = n - 1 = 6 - 1 = 5

Therefore, z = 3.365

Margin of error = 3.365 × 0.16/√6 = 0.22

Confidence interval is 2.48 ± 0.22

Part C

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

H0: µ = 2.3

For the alternative hypothesis,

H1: µ > 2.3

This is a right tailed test

Since the number of samples is small and no population standard deviation is given, the distribution is a student's t.

Since n = 6

Degrees of freedom, df = n - 1 = 6 - 1 = 5

t = (x - µ)/(s/√n)

Where

x = sample mean = 2.48

µ = population mean = 2.3

s = samples standard deviation = 0.16

t = (2.48 - 2.3)/(0.16/√6) = 2.76

We would determine the p value using the t test calculator. It becomes

p = 0.02

Assuming significance level, alpha = 0.05.

Since alpha, 0.05 > than the p value, 0.02, then we would reject the null hypothesis. Therefore, At a 5% level of significance, the sample data showed significant evidence that the mean absolute refractory period for all mice when subjected to the same treatment increased.

Step-by-step explanation:

7 0
3 years ago
What percent of 126 is 22
makkiz [27]
17% ? Idont know if its 22 divided by 126 or 126 divided by 22
5 0
3 years ago
Read 2 more answers
How do you solve this? please explain
Serggg [28]
Quick steps to solve this.

1. Lets square both. (X +Y)*2 = 7*7 
2. Then, X*2 + 2XY + Y*2 = 49
3. Since XY is given to 4, X*2 + 8 + Y*2 = 49
4. Move 8
5. X*2 + Y*2 = 49 - 8
6. X*2 + Y*2 = 41

The answer is "41"  Boom!
7 0
4 years ago
What is the direction and strength of the association between the variables?
STatiana [176]

Answer:

Strong Negative

Step-by-step explanation:

Took the test and know this is the right answer.

7 0
3 years ago
Find the unit rate if a 4 pack of mixed fruit sells for $2.12
Nat2105 [25]
$0.53. Divide $2.12 by 4.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Dew help me please come on
    14·1 answer
  • Find the equation of the line passing through the point (-4,6). And having a slop of 1/2
    8·1 answer
  • How many solutions does this system have?
    7·2 answers
  • a blank CD can hold 70 minutes of music. So far, you have burned 25 minutes of music onto the cd. You estimate each song lasts 4
    12·2 answers
  • Help me with this I was trying to figure this out for half an hour /4rth grade Go math
    12·1 answer
  • Match the information on the left with the appropriate equation on the right.
    15·1 answer
  • A ship traveled at an average rate of 25 miles per hour going west. It then traveled at an average rate of 19 miles per hour hea
    9·2 answers
  • Confusing stuff! Giving out 50 big points!
    12·2 answers
  • Hi my name is stephanie
    9·2 answers
  • he table below shows how many people have signed up for a walking fundraiser. The walkers are being organized in groups of 15 pe
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!