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Solving for angles - Geometry

Otrada [13]

Answer:

<BAC=19

Step-by-step explanation:

<AOB=<DOC=142

<BAC=<ABD

2<BAC=180-142

2<BAC=38

<BAC=38/2

<BAC=19

7 0

3 years ago

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There are 92 students that equals 75 how many students are 100 percent

elena-s [515]

Answer:

122.67 or round it to 123

Step-by-step explanation:

i used the butterfly method.

92/75 = x/100.

i multiplied 92*100=9200

then i divided it with 75.

9200/75=x

so the answer is

x=122 or 123

4 0

3 years ago

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What is the coefficient of xy2

Gre4nikov [31]

Answer:

1 is the coefficient.

There is no number Infront of variable.Hence if there is no number thrlere is 1. xysquare 1 is the coefficient,X and y are base and square is Exponent.

7 0

2 years ago

How many sides does a polygon have if the sum of its angle measures is 2700 degrees and how do you find this?

ss7ja [257]

The number of angles equal the number of sides

The number of angles calculate: (n-2)x180°

(n-2)x180°=2700° |divide both sides by 180°

n-2=15 |add 2 to both siedes

n=13

Answer: 13 sides.

6 0

3 years ago

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We intend to estimate the average break time of Dunder Mifflin employees. From a previous study, we believe that the average tim

arsen [322]

Answer:

The minimum sample size that we should consider is of 60 employees.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

We want our 99 percent confidence interval to have a margin of error of no more than plus or minus 2 minutes. What is the smallest sample size that we should consider?

We need to find n for which $M = 2, \sigma = 6$