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kap26 [50]
3 years ago
10

Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the dif

ference between proportions of men and women who own smartphones. Assume that you want 99​% confidence that your error is no more than 0.025.
The sample should include ___ men and __ women.
(type whole numbers.)

- Thank you <3
Mathematics
1 answer:
rodikova [14]3 years ago
4 0

Answer:

60men 40 women.... but I ain't sure

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20 because 19 16/33 is the exact answer. Since they ask about how much that can be rounded up to 20
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The world population at the beginning of 1980 was 4.5 billion. Assuming that the population continued to grow at the rate of app
AfilCa [17]

Answer:

Q(t) = 4.5(1.013)^{t}

The world population at the beginning of 2019 will be of 7.45 billion people.

Step-by-step explanation:

The world population can be modeled by the following equation.

Q(t) = Q(0)(1+r)^{t}

In which Q(t) is the population in t years after 1980, in billions, Q(0) is the initial population and r is the growth rate.

The world population at the beginning of 1980 was 4.5 billion. Assuming that the population continued to grow at the rate of approximately 1.3%/year.

This means that Q(0) = 4.5, r = 0.013

So

Q(t) = Q(0)(1+r)^{t}

Q(t) = 4.5(1.013)^{t}

What will the world population be at the beginning of 2019 ?

2019 - 1980 = 39. So this is Q(39).

Q(t) = 4.5(1.013)^{t}

Q(39) = 4.5(1.013)^{39} = 7.45

The world population at the beginning of 2019 will be of 7.45 billion people.

6 0
3 years ago
Find the equation of the line<br> Slope =4/3<br> y-intercept =-5
AlladinOne [14]

Answer:

y=4/3x - 5

Step-by-step explanation:

5 0
2 years ago
Josh is hiking glacier national park. He has now hiked a total of 17km and is 2km short of being 1/2 of the way done with his hi
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Answer: The total length in kilometers is 38 km


Step-by-step explanation:


17 + 2 = 19 km is 1/2 of the total length, that is,


19 = (1/2)h


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h = 2*19


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I need help asap someone please help ​
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Answer:

c = 20

so , c >20 ...........

8 0
3 years ago
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