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denis-greek [22]
3 years ago
9

If the radius of a circle is 12 cm and the Circumference is C cm, what is an expression for finding π?

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
5 0

Answer:

Step-by-step explanation:

circumference=2πr

2πr = C

2*π*12 = C

24π = C

\pi = \frac{C}{24}

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In how many ways can a committee of 4 be chosen from a group of 9 people?
QveST [7]
Since this is a combination not a permutation problem, (order does not matter) you should use the "n choose k" formula.

C=n!/(k!(n-k)!)  where C is the number of unique combinations, n equals the total number of possible choices and k equals the specific number of choices.  In this case:

C=9!/(4!(9-4)!)

C=9!/(4!5!)

C=362880/(24*120)

C=362880/2880

C=126

So there are 126 unique ways to pick 4 people from a group of 9 people.
3 0
3 years ago
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Petra booked a family holiday.
lana [24]
3500 x 120% = 4200
4200 - 900 = 3300
3300 ÷ 6 = 550 <<< answer

hope it helps!
3 0
3 years ago
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The world record for most drum beats per minute is 2,109 beats. How many beats would that be in 3 minutes?
IrinaVladis [17]

Answer:

6327

Step-by-step explanation:

2109 bpm. you want to know how many times in  minutes

Well all you do is 2109*3=6327

4 0
3 years ago
A local company is concerned about the number of days missed by its employees due to ill ness. A Random Sample of 10 employees i
sukhopar [10]

Answer:

The incentive program does not cuts down on the number of days missed by employees.

Step-by-step explanation:

The dependent t-test (also known as the paired t-test or paired samples t-test) compares the two means associated groups to conclude if there is a statistically significant difference amid these two means.

A paired <em>t</em>-test would be used to determine whether the incentive program cuts down on the number of days missed by employees.

The hypothesis for the test can be defined as follows:

<em>H₀</em>: The incentive program does not cuts down on the number of days missed by employees, i.e. <em>d</em> ≥ 0.

<em>Hₐ</em>: The incentive program cuts down on the number of days missed by employees, i.e. <em>d</em> < 0.

From the information provided the data computed is as follows:

 n=10\\\bar d=-1.1\\SD_{d}=2.99

Compute the test statistic value as follows:

 t=\frac{\bar d}{SD_{d}/\sqrt{n}}

   =\frac{-1.1}{2.99/\sqrt{10}}\\\\=-1.16

The test statistic value is -1.16.

Decision rule:

If the p-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

Compute the p-value of the test as follows:

p-value=P(t_{n-1}

*Use a t-table.

The p-value of the test is 0.1379.

The p-value of the test is very large for all the commonly used significance level. The null hypothesis will not be rejected.

Thus, there is not enough evidence to support the claim.

Conclusion:

The incentive program does not cuts down on the number of days missed by employees

4 0
3 years ago
What happened that caused Nollie's housemate, Katrien, to arrive at the ten Boom's house in an emotional state?
REY [17]

Answer:

Nollie told the police that Annaliese was a Jew

Step-by-step explanation:

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3 years ago
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