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ycow [4]
3 years ago
11

On a particular day, 6 students in a class were absent, which is 20% of the class. What is the total number of students in the c

lass?
Mathematics
1 answer:
tino4ka555 [31]3 years ago
6 0

Answer:

30

Step-by-step explanation:

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A college student organization wants to start a nightclub for students under the age of 21. To assess support for this proposal,
eduard

Answer:

a) Sample size = 822

b) Margin of error = 0.03407          

Step-by-step explanation:

We are given the following in the question:

p = 74% = 0.74

a) Sample size is required to obtain margin of error of 0.03

Formula:

\text{Margin of error} = z_{\text{statistic}}\times \sqrt{\dfrac{p(1-p)}{n}}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting values, we get,

0.03 = 1.96\times \sqrt{\dfrac{0.74(1-0.74)}{n}}\\\\n = (\dfrac{1.96}{0.03})^2(0.74)(1-0.74)\\\\n = 821.24 \approx 822

Thus, the sample size must be approximately 822  to obtain a 95% confidence interval with an approximate margin of error of 0.03

b) Margin of error for the 95% confidence interval

p = 54% = 0.54

Formula:

\text{Margin of error} = z_{\text{statistic}}\times \sqrt{\dfrac{p(1-p)}{n}}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting values, we get,

\text{Margin of error} = 1.96\times \sqrt{\dfrac{0.54(1-0.54)}{822}}\\\\=0.03407

The margin of error now will be 0.03407.

5 0
3 years ago
Find the coordinates of the point 3/10<br> of the way from A to B.
maxonik [38]

Answer:

Your Simply looking at the other side:)

Step-by-step explanation:

The Answer would be....... (-3 to 10)

6 0
3 years ago
How long would it take for a ball dropped from the top of a 484-foot building to hit the ground?
pochemuha

Answer:

First, convert the ft to standard units of meters.

1 foot = 0.3048 meters

Therefore,

484 ft = 147.5232 meters

Then, we will use the laws of motion to calculate the time:

x = 0.5 at^2

where:

x is the displacement

a is the gravity (9.8 m/sec^2)

t is the time taken

Substitute in the equation with the givens to calculate the time as follows:

147.5232 = (0.5 x 9.8) t^2

t^2 = 147.5232 / (0.5 x 9.8)

t^2 = 30.11 seconds

t = 5.49

HOPE THIS HELPED!!!!!!!XDD

LOVE, AZZY

4 0
3 years ago
Describe one way in which the usage of vertex-edge graphs apply to you
LuckyWell [14K]

Answer:

you will be able to create and representations the vertex - edge graphs.

5 0
3 years ago
Please help me get started <br> 20 pts <br> In return I can help with Spanish Hw
sesenic [268]

Answer:

rate=10

Step-by-step explanation:

30/3=10

70/7=10

110/11=10

7 0
3 years ago
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