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Gemiola [76]
3 years ago
14

The table shows the number of boys and girls that have black blonde brown or red hair color.

Mathematics
2 answers:
Naddik [55]3 years ago
5 0

Answer:

A) 0.23

Step-by-step explanation:

There are 9 black-haired students, out of 40 students.

9

40

= 0.23

skad [1K]3 years ago
3 0

Answer:

The answer would be A

Step-by-step explanation:

if you add the students that have only black hair and all the students together and put it as a fraction of black hair over total students, you get 9/41. you divide that and you get 0.219 and rounding you get 0.22 and the closest answer is A.

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A rainbow is an arc of colors that is visible in the sky, caused by the refraction and dispersion of light after rain or other w
Masteriza [31]

Answer:

Red, orange, yellow, green, cyan, blue and purple.

Step-by-step explanation:

The rainbow is a colorful visual and meteorological phenomenon, in which the range of colors that compose the visible light in the sky appears. The phenomenon occurs when the sun's rays fall on raindrops in the Earth's atmosphere and is an example of refraction, after reflection. Each color is refracted at a different angle inside the droplets (which act like small prisms), it undergoes a different deflection and so the visible white light is analyzed in the different colors that compose it.

7 0
3 years ago
In 1982 Abby’s mother scored at the 93rd percentile in the math SAT exam. In 1982 the mean score was 503 and the variance of the
oksian1 [2.3K]

Answer:

The percentle for Abby's score was the 89.62nd percentile.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation(which is the square root of the variance) \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Abby's mom score:

93rd percentile in the math SAT exam. In 1982 the mean score was 503 and the variance of the scores was 9604.

93rd percentile. X when Z has a pvalue of 0.93. So X when Z = 1.476.

\mu = 503, \sigma = \sqrt{9604} = 98

So

Z = \frac{X - \mu}{\sigma}

1.476 = \frac{X - 503}{98}

X - 503 = 1.476*98

X = 648

Abby's score

She scored 648.

\mu = 521 \sigma = \sqrt{10201} = 101

So

Z = \frac{X - \mu}{\sigma}

Z = \frac{648 - 521}{101}

Z = 1.26

Z = 1.26 has a pvalue of 0.8962.

The percentle for Abby's score was the 89.62nd percentile.

3 0
3 years ago
if the length of a rectangle is 6 times the width, and the perimeter is 210 cm, find the dimensions of the rectangle
Mandarinka [93]

Answer:im not sure but it’s 180Cm

Step-by-step explanation:worked it in my head

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3 years ago
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80085 because this is the circumference which u multiply across surface area that gives u the volume.
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A line segment is different from a line in that a segment has
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A line segment is different from a line in that a segment has TWO END POINTS.
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