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3 years ago

Please help me... thank you ill give brainliest

Mathematics

1 answer:

Jet001 [13]3 years ago

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Although bats are not known for their eyesight, they are able to locate prey (mainly insects) by emitting high-pitched sounds an

Sergeu [11.5K]

Answer:

$Mean = 48.6364$

$s^2 = 331.8545$ -- Sample Variance

$s = 18.2169$ --- Sample Standard Deviation

Step-by-step explanation:

Given

$n = 11$

$Data: 24, 41 ,25 ,68 ,53 ,83 ,43 ,63 ,56 ,34 ,45$

Solving (a): The sample mean

$Mean = \frac{\sum x}{n}$

So:

$Mean = \frac{24 +41 +25 +68 +53 +83 +43 +63 +56 +34+ 45}{11}$

$Mean = \frac{535}{11}$

$Mean = 48.6364$

Solving (b): Sample variance (s^2)

This is calculated as:

$s^2 = \frac{\sum (x - \bar x_i)^2}{n - 1}$

Where:

$\bar x = 48.6364$

So:

$s^2 = \frac{(24 -48.6364)^2 +(41 -48.6364)^2 +......................+( 45 -48.6364)^2}{11-1}$

$s^2 = \frac{3318.54545456}{10}$

$s^2 = 331.8545$

Solving (c): Sample Standard Deviation (s)

This is calculated as:

$s = \sqrt {s^2$

$s = \sqrt{331.8545$

$s = 18.2169$

8 0

3 years ago

A large cube has 5 layers, each with 5 rows of 5 small cubes. How many small cubes will the larger cube have.

Crank

Answer:

The large cube will contain 125 total small cubes.

Step-by-step explanation:

In order to find this, we multiply the number of rows by the number of cubes in a row.

5 * 5 = 25

Now we take that number and we multiply it by the number of layers total.

25 * 5 = 125

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3 years ago

A company dyes two sizes of rugs. A small rug requires 4 hours for dyeing and a medium-size rug requires 6 hours for dyeing. The

Nadusha1986 [10]

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Sunny_sXe [5.5K]

Answer:

87 degree angle

Step-by-step explanation:

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Each fat candle represents 15 years, there are 5 small candles which makes 5 years and then you have 45 years left, divide that by 3 because there are 3 fat candles and you get 15.

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