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
Dima020 [189]
3 years ago
10

The circumference of a circular field is 241.78 yards. What is the radius of the field? Use 3.14 for it and do not round your an

swer.
Mathematics
1 answer:
Elena-2011 [213]3 years ago
5 0

Answer:

38.5 yards

Step-by-step explanation:

The circumference is the diameter multiplied by pi, and the radius is half of the diameter. If we divide 241.37 by pi we get a diameter of 77, and half of that is the radius, which is 38.5.

You might be interested in
The test statistic of zequals2.32 is obtained when testing the claim that pgreater than0.3. a. Identify the hypothesis test as b
Sonja [21]

Answer:

a) We need to conduct a hypothesis in order to test the claim that the true proportion p is greatr than 0.3, so then the system of hypothesis are.:  

Null hypothesis:p \leq 0.3  

Alternative hypothesis:p > 0.3  

Right tailed test

b) p_v =P(z>2.32)=0.0102  

c) So the p value obtained was a very low value and using the significance level given \alpha=0.1 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 1% of significance the proportion of interest is higher than 0.3

Step-by-step explanation:

Part a: Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the true proportion p is greatr than 0.3, so then the system of hypothesis are.:  

Null hypothesis:p \leq 0.3  

Alternative hypothesis:p > 0.3  

Right tailed test

When we conduct a proportion test we need to use the z statisitc, 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  

For this case the statistic is given by z_{calc}= 2.32

Part b: Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The next step would be calculate the p value for this test.  

Since is a right tailed test the p value would be:  

p_v =P(z>2.32)=0.0102  

Part c

So the p value obtained was a very low value and using the significance level given \alpha=0.1 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 1% of significance the proportion of interest is higher than 0.3

6 0
3 years ago
Ellen drove 357.9 miles. Her car gets about 21 miles per gallon. Which is the best estimate of how many gallons of gas Ellen use
olga55 [171]
The best thing to do is to divide the amount she has driven (357.9) by the miles (21)
As you're looking for an estimate, you have to round them.
357.9 rounds to 360
21 rounds to 20
Therefore, you've got to divide them
360/20= 18
Therefore, Ellen has driven approximately 18 miles
Hope this helps :)
7 0
3 years ago
Read 2 more answers
How do you get 2 bases in (2 dimensional geometry) ? an example please. The problem I’m am trying to solve is
Vsevolod [243]
The answer is 0.5 I think your welcome
7 0
3 years ago
CoNfUsIoN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
lys-0071 [83]

Answer:

it has infinitely many solutions because it can be solved by many technics

Step-by-step explanation:

hope my answer helps mark me brianliest plz

6 0
3 years ago
to make a trail mix you have 4 cups of pretzels and 2 cups of bread chips .what is the ratio of pretzels t bread chips ?
geniusboy [140]
4:2 or when simplified 2:1
8 0
3 years ago
Read 2 more answers
Other questions:
  • Help pls, Which graph correctly shows point A representing z1 − z2 on a complex plane where z1 and z2 are complex numbers?
    6·1 answer
  • 15% of $9 is $____________
    12·2 answers
  • What will the sale price be of a t-shirt that has an original price of $24.99 and is on sale for 30% off
    6·1 answer
  • Think I know this but need help
    8·1 answer
  • Please please please please
    10·1 answer
  • Find the volume of the darkly shaded region
    15·1 answer
  • HLP HLP HLP HLP 10 10 10
    7·1 answer
  • Solve the inequality.<br> 4x + 3 &lt; 7 or 3x – 8 &gt; 7<br> -<br> x &lt; [?] or x &gt; [
    15·1 answer
  • PLEASE . i’ve fallen behind cos i can’t do this even when using websites.. it’s a week behind my work
    14·1 answer
  • 3x4.-4<br> 5x3 - 2x2<br> 4x3 + 6x<br> ?<br> 4x4 - 2x2 – 3x
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!