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3 years ago

SHOW ALL OF WORK. Find missing length, round to the nearest tenth if necessary.

Mathematics

2 answers:

hoa [83]3 years ago

8 0

This is using the pythagorean theorem:)

Basile [38]3 years ago

3 0

Answer:

Step-by-step explanation:

to do this you need to use the Pythagorean theorem

a^2+b^2=c^2

9^2+12^2=c^2

81+144=c^2

$\sqrt{225}$ = $\sqrt{c^2}$

c=15

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16/20 of the girls have brown hair
15/20 of the girls have long hair

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3 years ago

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In the United States, the mean birth weight for boys is 3.41 kg with a standard deviation of 0.55 kg. Assume that the distributi

lyudmila [28]

Answer:

The proportion of baby boys in the United States that are born with low birth weight is 0.0495.

Step-by-step explanation:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , 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.

3.41 kg with a standard deviation of 0.55 kg.

This means that $\mu = 3.41, \sigma = 0.55$

What proportion of baby boys in the United States are born with low birth weight?

This is the pvalue of Z when X = 2.5. So

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

$Z = \frac{2.5 - 3.41}{0.55}$

$Z = -1.65$

$Z = -1.65$ has a pvalue of 0.0495

The proportion of baby boys in the United States that are born with low birth weight is 0.0495.

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3 years ago

Which of the following best describes rotational symmetry

Gala2k [10]

Answer: B

Step-by-step explanation:

A best describes the quality of symmetry, not specifically rotational symmetry.

C applies to that of A.

D applies to flipping an image across an axis.

B specifically outlines the symmetry of an object when rotated, thus B would be the most precise answer.

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3 years ago

A class has $140 for tickets to a science museum. The teacher writes $140÷10=14. Alma says that tickets are $14 each. Mohamed sa

DanielleElmas [232]

Alma was definitely correct to say that the tickets are $14 each.

The total amount in dollars the class have for tickets to the science museum

is $140.

The teacher writes as follows:

140 ÷ 10 = 14

Alma says the tickets are $14 each.

Mohammed says that 14 students are going for the trip

The teacher divided 140 by 10. This means the number of student in the class is 10 not 14 as Mohammed enunciated.

The teacher divided the total amount available for the ticket($140) by the number of student in the class(10). Then the quotient ($14) is the amount in dollars which each student will pay for the ticket to the science museum.

Therefore, Alma was definitely correct.

learn more about algebra here: brainly.com/question/11455464?referrer=searchResults

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3 years ago

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