4 years ago

PLZ HELP WILL MARK BRAINLIEST

Mathematics

1 answer:

fomenos4 years ago

3 0

720-100= 620
620- 120 = 500
500 - 112 = 388
388-128 = 260
260-133= 127
x=127

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notsponge [240]

Answer: 0.1457

Step-by-step explanation:

Let p be the population proportion.

Given: The proportion of Americans who are afraid to fly is 0.10.

i.e. p= 0.10

Sample size : n= 1100

Sample proportion of Americans who are afraid to fly = $\hat{p}=\dfrac{121}{1100}=0.11$

We assume that the population is normally distributed

Now, the probability that the sample proportion is more than 0.11:

$P(\hat{p}>0.11)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}>\dfrac{0.11-0.10}{\sqrt{\dfrac{0.10(0.90)}{1100}}})\\\\=P(z>\dfrac{0.01}{0.0090453})\ \ \ [\because z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}} ]\\\\=P(z>1.1055)\\\\=1-P(z\leq1.055)\\\\=1-0.8543=0.1457\ \ \ [\text{using z-table}]$

Hence, the probability that the sample proportion is more than 0.11 = 0.1457

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3 years ago

How much acetic acid is in a 5 liter container that is marked 80% acetic acid. How much is water

Vinvika [58]

Answer:

1 liter of water

Step-by-step explanation:

If 80 % is acid that's means 4 liters of the 5 is acid. (0.8 * 5)

The remaining amount is 1

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3 years ago

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Solve for y. You must write your answer in fully simplified form.<br><br> -12 = -5y

MArishka [77]

Answer:

Y= 12/5

Step-by-step explanation:

-12= -5y

-12/-5=y

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Mazyrski [523]

Answer:

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Step-by-step explanation:

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