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2 years ago

Ow many decimals numbers are there whose value equals the average of their digits?

Mathematics

1 answer:

kiruha [24]2 years ago

6 0

Answer:

Step-by-step explanation:

there are infinite numbers between 2 and 3 having average=2.5

2.49,2.51

2.48,2.52

2.47,2.53

2.46,2.54

.................

2.491,2.509

2.492,2.508

2.493,2.507

......................

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

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3 years ago

Read 2 more answers

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

Akimi4 [234]

Answer:

673 people

Step-by-step explanation:

Statistics<3

Use the margin of error formula.

ME = t* $\frac{s}{\sqrt{n} }$

Margin of error or ME = 3
Critical t or t* with a confidence level of 95% on the calculator is invNorm(.975) = 1.96. You would use invt, except you don't have the degrees of freedom, so you can approximate with invNorm. It's close enough.
Standard deviation or s = 39.7
Solve for n!

3 = 1.96* $\frac{39.7}{\sqrt{n} }$