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makkiz [27]
3 years ago
14

ASAP Help again please

Mathematics
1 answer:
Arisa [49]3 years ago
4 0

Answer:

Step-by-step explanation:

c. 0.875

140,000,000x0.25=35,000,000

35,000,000/40,000,000=0.875

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What is the radius of the circle x2+(y+6)2=25
GenaCL600 [577]

Answer: y=7

Step-by-step explanation:

Use the vertex form to determine the values of

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Direction: Opens Down

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0

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6 0
2 years ago
The Institute of Education Sciences measures the high school dropout rate as the percentage of 16- through 24-year-olds who are
STALIN [3.7K]

Answer:

We conclude that the proportion of dropouts has changed from the historical value of 0.081.

Step-by-step explanation:

We are given that in 2009, the high school dropout rate was 8.1%. A polling company recently took a survey of 1000 people between the ages of 16 and 24 and found 6.5% of them are high school dropouts.

The polling company would like to determine whether the proportion of dropouts has changed from the historical value of 0.081.

<em>Let p = proportion of school dropouts rate</em>

SO, <u>Null Hypothesis,</u> H_0 : p = 0.081   {means that the proportion of dropouts has not changed from the historical value of 0.081}

<u>Alternate Hypothesis</u>, H_A : p \neq 0.081   {means that the proportion of dropouts has changed from the historical value of 0.081}

The test statistics that will be used here is <u>One-sample z proportion statistics</u>;

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

where, \hat p  = sample proportion of high school dropout rate = 6.5%

            n = sample of people = 1000

So, <u><em>test statistics</em></u>  =   \frac{0.065-0.081}{{\sqrt{\frac{0.065(1-0.065)}{1000} } } } } 

                               =  -2.05

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

         P-value = P(Z < -2.05) = 1 - P(Z \leq 2.05)

                                              = 1 - 0.97982 = <u>0.0202</u> or 2.02%

<em>Now at 5% significance level, the z table gives critical values between -1.96 and 1.96 for two-tailed test. Since our test statistics does not lies within the range of critical values of z so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region.</em>

Therefore, we conclude that the proportion of dropouts has changed from the historical value of 0.081.

7 0
3 years ago
Write an expresstion that is equivalent to 1/3x+3/4+2/3x-1/4-2/3x
nadya68 [22]

Answer:

1/3x+1/2

Step-by-step explanation:

4 0
2 years ago
Can you plz help me...
Paha777 [63]

The solution is where the two red lines cross each other.

The graph has a blue dot where the lines cross.

It is at X = 2 and Y = -3


The answer is (2,-3)

7 0
3 years ago
Read 2 more answers
I need help please help m
Bond [772]

there are 10 numbers you want either a 4 or 7 ( 2 numbers)

 so probability is 2/10 which reduces to 1/5

5 0
2 years ago
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