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Marta_Voda [28]
2 years ago
14

Which property is this an example of?

Mathematics
2 answers:
belka [17]2 years ago
7 0

Answer:

Multiplicative inverse property

Step-by-step explanation:

Multiplicative inverse property states that

  • Any number multiplied with its reciprocal or multiplicative inverse yields the result as 1

For example

A number 4

Reciprocal=1/4

Product

  • 4(1/4)
  • 1

Verified

Diano4ka-milaya [45]2 years ago
3 0

Answer:

Inverse Property of Multiplication

Step-by-step explanation:

<u>Inverse Property of Multiplication</u>

The <em>product </em>of a <u>number</u> and its <u>reciprocal</u> is always 1.

The <em>reciprocal</em> of a number is <u>1 divided by the number</u>.

Therefore, the reciprocal of a rational number is its inverse (swap the numerator and denominator).

For example:

\textsf{The reciprocal of 6 is}\:\:\sf \dfrac{1}{6}

\implies \sf 6 \times \dfrac{1}{6}=\dfrac{6 \times 1}{6}=\dfrac{\diagup\!\!\!\!6 \times 1}{\diagup\!\!\!\!6}=1

\sf \textsf{The reciprocal of }\:\dfrac{3}{4} \sf \:\:is\:\:\sf \dfrac{4}{3}

\sf \implies \dfrac{3}{4} \times \dfrac{4}{3}=\dfrac{3 \times 4}{4 \times 3}=\dfrac{12}{12}=1

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Comparing observations from different populations: The heights of adult men in America are normally distributed, with a mean of
Schach [20]

Answer:

a. Z = 1.99

b. 97.67%

c. Z = 2.56

d. 0.52%

Step-by-step explanation:

Normal Probability Distribution:

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

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

a. If a man is 6 feet 3 inches tall, what is his z-score (to two decimal places)?

The heights of adult men in America are normally distributed, with a mean of 69.7 inches and a standard deviation of 2.66 inches, and thus, we have \mu = 69.7, \sigma = 2.66

6 feet 3 inches = 6*12 + 3 = 75 inches, which means that we have to find z when X = 75. So

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

Z = \frac{75 - 69.7}{2.66}

Z = 1.99

b. What percentage of men are SHORTER than 6 feet 3 inches?

The proportion is the p-value of Z = 1.99.

Looking at the z-table, Z = 1.99 has a p-value of 0.9767.

0.9767*100% = 97.67%, which is the answer.

c. If a woman is 5 feet 11 inches tall, what is her z-score (to two decimal places)?

The heights of adult women in America are also normally distributed, but with a mean of 64.5 inches and a standard deviation of 2.54 inches, and thus, we have \mu = 64.5, \sigma = 2.54. We have to find Z when X = 5*12 + 11 = 71. So

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

Z = \frac{71 - 64.5}{2.54}

Z = 2.56

d. What percentage of women are TALLER than 5 feet 11 inches?

The proportion is 1 subtracted by the p-value of Z = 2.56.

Looking at the z-table, Z = 2.56 has a p-value of 0.9948.

1 - 0.9948 = 0.0052

0.0052*100% = 0.52%, which is the answer.

3 0
3 years ago
If the range of the function f(x) = 4x – 3 is {11.4, 15, 17, 29}, what is its domain?
svetoff [14.1K]
Find x for each range value.

for example, 11.4 = 4x-3⇒ x=14.4/4 =3.6

all the x values together constitute the domain.

But, in this case, only the last option has 3.6

hence, answer is E
3 0
4 years ago
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MrMuchimi

Answer:

Step-by-step explanation:

3 0
3 years ago
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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