3 years ago

HELPPp!!!!!! What is the surface area of the figure below?

Mathematics

1 answer:

kogti [31]3 years ago

6 0

Answer:

Step-by-step explanation:

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Zero product property: (x-4)(-5x+1)=0 lesser x= greater x=

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Answer:

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3 years ago

Suppose you are given two quadrilaterals, ABCD EFGH. If the similarity ratio of ABCD to EFGH is 4:3, and if EH = 60, find AD.

Sophie [7]

4/3 = AD/EH (similarity)

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so, 80

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4 years ago

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Step-by-step explanation:

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3 years ago

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Marizza181 [45]

You can prove it by the SAS postulate which should be the first option

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3 years ago

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A researcher wishes to estimate, with 9090% confidence, the proportion of adults who have high-speed Internet access. Her es

Sunny_sXe [5.5K]

Answer: a) Required minimum sample size= 219

b) Required minimum sample size= 271

Step-by-step explanation:

As per given , we have

Margin of error : E= 5% =0.05

Critical z-value for 90% confidence interval : $z_{\alpha/2}=1.645$

a) Prior estimate of true proportion: p=28%=0.28

Formula to find the sample size :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.28(1-0.28)(\dfrac{1.645}{0.05})^2\\\\=218.213856\approx219$

Required minimum sample size= 219

b) If no estimate of true proportion is given , then we assume p= 0.5

Formula to find the sample size :-

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.645}{0.05})^2\\\\=270.6025\approx271$

Required minimum sample size= 271

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3 years ago