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1 year ago

Use the following function rule to find f(2). f(x) = 10x f(2)=

Mathematics

1 answer:

zalisa [80]1 year ago

3 0

It would be 20, since you’re replacing the x value with 2. 10(2) is 20.

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Which expression is the same as (2a + b)3?

user100 [1]

Answer:

I guess it's A

Step-by-step explanation:

2*2*2+b*b*b

that's 8a³+b³

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2 years ago

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Anika [276]

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Step-by-step explanation:

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2 years ago

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Vsevolod [243]

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2 years ago

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A sample of 5 strings of thread is randomly selected and the following thicknesses are measured in millimeters. Give a point est

liq [111]

Answer:

$s^2 = \frac{(1.48-1.502)^2 +(1.45-1.502)^2 +(1.54-1.502)^2 +(1.52-1.502)^2 +(1.52-1.502)^2}{5-1} =0.00132$

And for the deviation we have:

$s= \sqrt{0.00132}=0.0363$

And that value represent the best estimator for the population deviation since:

$E(s) =\sigma$

Step-by-step explanation:

For this case we have the following data:

1.48,1.45,1.54,1.52,1.52

The first step for this cae is find the sample mean with the following formula:

$\bar X =\frac{\sum_{i=1}^n X_}{n}$

And replacing we got:

$\bar X= \frac{1.48+1.45+1.54+1.52+1.52}{5} = 1.502$

And now we can calculate the sample variance with the following formula:

$s^2 =\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}$

And replacing we got:

$s^2 = \frac{(1.48-1.502)^2 +(1.45-1.502)^2 +(1.54-1.502)^2 +(1.52-1.502)^2 +(1.52-1.502)^2}{5-1} =0.00132$

And for the deviation we have:

$s= \sqrt{0.00132}=0.0363$

And that value represent the best estimator for the population deviation since:

$E(s) =\sigma$

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2 years ago

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Round each number to the nearest ten thousand and then subtracting

katrin [286]

Answer:

43,000

Step-by-step explanation:

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3 years ago