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KATRIN_1 [288]
3 years ago
8

Pls help me, if you get it right I will give you Brainlist!​

Mathematics
1 answer:
o-na [289]3 years ago
8 0

Answer:

38.5

Step-by-step explanation:

The formula for the area of the circle is \pi rx^{2} \\.

Since you have the diameter and you're told to use 3.14 as pi, all you need to do is to substitute.

The diameter is also 2 times the size of the radius so you divide 7 by 2.

So (3.14)(3.5)^{2} = 38.5

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A newsletter publisher believes that above 41A% of their readers own a personal computer. Is there sufficient evidence at the 0.
zhuklara [117]

Complete Question

A newsletter publisher believes that above 41% of their readers own a personal computer. Is there sufficient evidence at the 0.10 level to substantiate the publisher's claim?

State the null and alternative hypotheses for the above scenario.

Answer:

The null hypothesis is  H_o :  p \le  0.41

The  alternative hypothesis  H_1  :  p> 0.41

Step-by-step explanation:

From the question we are told that

      The population proportion is p  =  0.41

        The level of significance is  \alpha  = 0.10

The null hypothesis is  H_o :  p \le  0.41

The  alternative hypothesis  H_1  :  p> 0.41

         

8 0
3 years ago
Mrs. R is pregnant and very worried that the child will have beta-thalassemia. What is the probability that the child will have
kenny6666 [7]

Answer:

There are three kind of beta-thalassemia.

Total possible outcome=  3 types of beta- thalassemia + 1 [child will have no trace of disease] = 4

As we know Probability(outcome) = \frac{\text{ Total favorable outcome}}\text{Total possible outcome}

Probability that the child will have beta-thalassemia major =\frac{_{1}^{3}\textrm{C}}{_{1}^{4}\textrm{C}}

     =\frac{3}{4}

   ∴ favorable=_{1}^{3}\textrm{C}

 And , Total =_{1}^{4}\textrm{C}

Probability that the child will have no trace of the disease=\frac{1}{4}





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