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3 years ago

1. A = {2, 4, 6, 8, 10), B = {1,2,3,4,5,6,7,8,9,10}Find A UB and An B.(7

Mathematics

1 answer:

Sladkaya [172]3 years ago

5 0

Answer:

AUB=2,4,6,8,10 & AnB=1,3,5,7,9

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Answer: C

Step-by-step explanation:

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3 years ago

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A news agency publishes results of a recent poll. It reports that candidate A leads candidate B by 10% because 45% of the poll p

natali 33 [55]

We need to use the formula to find Margin of Error but through the sample proportion, that is

$E=z*\sqrt{\frac{\hat{p}(1-\hat{p})}{n}}$

We will use a 95% confidence interval, that is a z value of 1.96 (Search in a Normal distribution table)

A) For A our $\hat{p}$ (proportion) is equal to 0.45. So applying the formula,

$E=1.96*\sqrt{\frac{0.45(1-0.45)}{900}}$

$E=3.25\%$

B) We make the same of point A, but change our proportion to 0.35

$E=1.96*\sqrt{\frac{0.35(1-0.35)}{900}}$

$E=3.116\%$

c) We need to calculate the SE through proportion for 0.1, that is

$SE = \sqrt{(\frac{\hat{p_1}(1-\hat{p_1})}{n})+(\frac{\hat{p_2}(1-\hat{p_2})}{n})}$

Then our Error is given by,

$E=z*SE$

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3 years ago

Solve for a: z=9a-9-3b

ss7ja [257]

Answer:

(z-9-3b)/9

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(z-9-3b)/9

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3 years ago

In the figure FAC=GBC. find DBC

kozerog [31]

So angle DBC is equal to 180° - 28° which is 152°

~~

I hope that helps you out!

Any more questions, please feel free to ask me and I will gladly help you out!!

~Zoey

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3 years ago

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natta225 [31]

Answer:

it is A

Step-by-step explanation:

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3 years ago

1. A = {2, 4, 6, 8, 10), B = {1,2,3,4,5,6,7,8,9,10}Find A UB and An B.(7​

1. A = {2, 4, 6, 8, 10), B = {1,2,3,4,5,6,7,8,9,10}Find A UB and An B.(7