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
Dimas [21]
3 years ago
6

I need help with this question?????

Mathematics
1 answer:
den301095 [7]3 years ago
8 0
18.84

Since the formula of circumference is C = 2 pi r or C = pi times diameter, you can conclude that the circumference is 18.84.

Assuming that pi is 3.14 in this case rather than the full pi or just in terms of pi.

Hope this helps!
You might be interested in
Which of the following describes the parabola with the equation y = 4x^2- 12x + 9?
densk [106]

Answer: I don’t know what options you have but I graphed it in the picture linked below

8 0
3 years ago
In a program designed to help patients stop smoking. 192 patients were given to sustained care, and 80.2% of them were no longer
stira [4]

Answer:

We conclude that 80% of patients stop smoking when given sustained care.

Step-by-step explanation:

We are given that in a program designed to help patients stop smoking. 192 patients were given to sustained care, and 80.2% of them were no longer smoking after one month.

Let p = <u><em>percentage of patients stop smoking when given sustained care.</em></u>

So, Null Hypothesis, H_0 : p = 80%     {means that 80% of patients stop smoking when given sustained care}

Alternate Hypothesis, H_A : p \neq 80%     {means that different from 80% of patients stop smoking when given sustained care}

The test statistics that would be used here <u>One-sample z test for proportions</u>;

                        T.S. =  \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion of patients who stop smoking when given sustained care = 80.2%

           n = sample of patients = 192

So, <u><em>the test statistics</em></u>  =  \frac{0.802-0.80}{\sqrt{\frac{0.802(1-0.802)}{192} } }

                                     =  0.07

The value of z test statistics is 0.07.

<u></u>

<u>Also, P-value of the test statistics is given by the following formula;</u>

                P-value = P(Z > 0.07) = 1 - P(Z \leq 0.07)

                              = 1 - 0.52790 = 0.4721

<u>Now, at 0.05 significance level the z table gives critical values of -1.96 and 1.96 for two-tailed test.</u>

Since our test statistic lies within the range of critical values of z, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <u>we fail to reject our null hypothesis</u>.

Therefore, we conclude that 80% of patients stop smoking when given sustained care.

8 0
3 years ago
A system of equations is shown x-2y=-5 2x+4y=14
gladu [14]

Answer: here you go

Step-by-step explanation:

A) 2x + 4y = 14

B) 4x + y = 20

If you multiply equation A by -2, then when the equations are added, the x will be eliminated.

The solutions are:

X = 4.714285714285714

Y = 1.1428571428571428

7 0
2 years ago
Pencils come in boxes of 10. How many boxes should Mr. Sawicki but if he needs 142 pencils?
pav-90 [236]
142/10= 14.2
Can’t get half a box
Answer:15 boxes
7 0
3 years ago
What is the value of a in the equation 3a + b = 54, when b = 9?
7nadin3 [17]

Answer:

15

Step-by-step explanation:

When b = 9,

=> 3a + 9 = 54

=> 3a + 9 - 9 = 54 - 9

=> 3a = 45

=> 3a/3 = 45/3

=> a = 15

Therefore, when b is 9, a is 15

8 0
3 years ago
Read 2 more answers
Other questions:
  • Determine the approximate value of X. <br><br> 8.56<br><br> 2.78<br><br> 9.46<br><br> 29.12
    15·1 answer
  • When Ryan counted some dimes and quarters he had 196 coins and a total of $39.40. How many coins of each kind does Ryan have?
    6·1 answer
  • SOLUTION TO 2X=3=X-4
    8·1 answer
  • What is the value of z in the equation 2z + 6 = −4?<br><br> 5<br> 1<br> −1<br> −5
    13·2 answers
  • What is the area of 3/4 foot and 16 feet?
    11·1 answer
  • This question here ?!
    8·1 answer
  • What do i do i need help
    5·2 answers
  • Which of the following is the correct point-slope equation for the line that
    13·1 answer
  • HELP!!! Please ASAP
    9·1 answer
  • Write the explicit formula which can be used to represent the sequence 5,9,13,17
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!