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ehidna [41]
3 years ago
10

Which of the following plantonic solids is also a cube?​

Mathematics
1 answer:
34kurt3 years ago
4 0

Answer:

Hexahedron

Step-by-step explanation:

A cube is a regular hexahedron, as both the hexahedron and the cube have 6 faces, and a hexhedron can sometimes be a cube.

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Write 800+60+4 in standard form
NNADVOKAT [17]
864=800+60+4 800 in the hundreds place 60 in the tens place and 4 in the ones place

5 0
3 years ago
A tobacco company claims that the amount of nicotene in its cigarettes is a random variable with mean 2.2 and standard deviation
Aleksandr-060686 [28]

Answer:

0% probability that the sample mean would have been as high or higher than 3.1 if the company’s claims were true.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are 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.

Central limit theorem

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 2.2, \sigma = 0.3, n = 100, s = \frac{0.3}{\sqrt{100}} = 0.03

What is the approximate probability that the sample mean would have been as high or higher than 3.1 if the company’s claims were true?

This is 1 subtracted by the pvalue of Z when X = 3.1. So

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

By the Central Limit Theorem

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

Z = \frac{3.1 - 2.2}{0.03}

Z = 30

Z = 30 has a pvalue of 1.

1 - 1 = 0

0% probability that the sample mean would have been as high or higher than 3.1 if the company’s claims were true.

4 0
3 years ago
Help I am being timed
Levart [38]

Answer:

Let us say  x  is a real number   and  z = a + ib  is complex

|x| > 0

|z| = |a + ib| =  square-root (a^2 + b^2)

Step-by-step explanation:

|x| > 0   the absolute value of a real number is a nonnegative real number

The |a + ib|  =  square-root of the sum of the squares of the real components of the complex number

3 0
2 years ago
What is the answer to 7(2y)?<br> Show your work on how to find the answer
kotykmax [81]
It would be 14y.... if you combine like terms you would get the following:
7(2y)
7•2
14y
5 0
2 years ago
Read 2 more answers
Add (3x4−2x3+4x−2) and (3x3−2x2−x+4). Question 2 options:
Natalka [10]

Answer: 3x^4 +x^3 -2x^2 +3x +2

Step-by-step explanation:

(3x^4 - 2x^3 + 4x -2) + (3x^3 - 2x^2 - x +4)

There are no like terms for 3x^4, so leave it alone.

-2x^3 + 3x^3 = 1x^3

No like terms for -2x^2

4x - x = 3x

-2 + 4 = 2

Answer? 3x^4 +x^3 -2x^2 +3x +2

(Please mark brainliest! :) )

5 0
2 years ago
Read 2 more answers
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