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Degger [83]
3 years ago
9

Can someone help me and explain this Algebra 2?

Mathematics
1 answer:
Tju [1.3M]3 years ago
5 0
Nth term of gp = a(1 - r^n)/(1 - r), where n∞ = 10, n = ∞, a = 2, r < 1
10 = 2(1 - r^∞)/(1 - r)
10 = 2/(1 - r)
1 - r = 2/10 = 1/5
r = 1 - 1/5 = 4/5
An infinite deometric series with a beginning value of 2 that converges to 10 has common ratio of 4/5.

The first four terms are: 2, 1.6, 1.28, 1.024
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If it is assumed that the heights of men are normally distributed with a standard deviation of 2.5 inches, how large a sample sh
Volgvan

Answer:

30 men

Step-by-step explanation:

In order to be sure that the sample mean does differ from the population mean by more than 0.90, the sample size (n) that should be used is given by:

0.90 < Z\frac{s}{\sqrt{n}}

Where 'Z' , for a 95% probability is 1.960, 's' is the standard deviation of 2.5 inches:

0.90 > 1.960\frac{2.5}{\sqrt{n}}\\n >(\frac{1.960*2.5}{0.9})^2\\n>29.64

Rounding up to the nearest whole number, the sample size should be at least 30 men.

7 0
2 years ago
EASY QUESTION!!!<br><br> 50 POINTS!!!!!
Andre45 [30]
I think it can be 605. I'm not sure exactly, but I think it is.
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2 years ago
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Which numbers in Set A = {−7, −4, 2, 14, 21, 34, 42} are elements of both Set B and Set C, shown below? Set B = {even numbers} S
sweet [91]

Answer:

14, 42

Step-by-step explanation:

Set A = {−7, −4, 2, 14, 21, 34, 42}

Set B = {even numbers}

Set C = {multiples of 7}

There is only one question asked

Which numbers in Set A are elements of both Set B and Set C,

We need it to be even and a multiple of 7

14 is even and a multiple of 7  and 42 is even and a multiple of 7

5 0
3 years ago
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the figure on the left represents a scale drawing 5yd. of the figure on the right 2 in. what is the scale?
Nikolay [14]

Answer:

90 : 1

Step-by-step explanation:

1 yard = 36 inches

5 yards = 36×5 = 180 inches

180 : 2

90 : 1

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3 years ago
What is the mean, median and mode for a data set of 50,42,55,38,40,55,and 61​
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Median: 38
Mode:55
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