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2 years ago

Find whether the no. 847,2160 are coprime or not

1 answer:

8 0

First what you need to do is find the HCF of both numbers.
After you've done that if it is 1 then they are what we call co-prime.
Now, if they are other than 1 they are not co-prime.

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The average reading speed of students completing a speed-reading course is 435 words per minute (wpm). If the standard deviation

nekit [7.7K]

Answer:

$Z = -1.58$

Z = -1.58 means that a reading speed of 340 wpm is 1.58 standard deviations below the mean reading speed.

$Z = 0.67$

Z = 0.67 means that a reading speed of 475 wpm is 0.67 standard deviations above the mean reading speed.

$Z = -0.25$

Z = -0.25 means that a reading speed of 420 wpm is 0.25 standard deviations below the mean reading speed.

$Z = 2.92$

Z = 2.92 means that a reading speed of 610 wpm is 2.92 standard deviations above the mean reading speed.

Step-by-step explanation:

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 a measure X is above or below the mean.

In this problem, we have that:

$\mu = 435, \sigma = 60$

a. 340 wpm

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

$Z = \frac{340 - 435}{60}$

$Z = -1.58$

Z = -1.58 means that a reading speed of 340 wpm is 1.58 standard deviations below the mean reading speed.

b. 475 wpm

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

$Z = \frac{475 - 435}{60}$

$Z = 0.67$

Z = 0.67 means that a reading speed of 475 wpm is 0.67 standard deviations above the mean reading speed.

c. 420wpm

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

$Z = \frac{420 - 435}{60}$

$Z = -0.25$

Z = -0.25 means that a reading speed of 420 wpm is 0.25 standard deviations below the mean reading speed.

d. 610wpm

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

$Z = \frac{610 - 435}{60}$

$Z = 2.92$

Z = 2.92 means that a reading speed of 610 wpm is 2.92 standard deviations above the mean reading speed.

6 0

3 years ago

Marissa deposited $900 in her savings account. the rate of simple interest is 5% per year. find the balance at the end of 4 year

Anvisha [2.4K]

Answer:

1080

Step-by-step explanation:

$900.00 per year at 5% is 45.00

5 0

2 years ago

The probability of selecting a "5" from a deck of playing cards is

IrinaVladis [17]

Answer:

1- 4/52 2- 50% 3- 50% 4- 13/52

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3 years ago

Rashad is filling a toy box that are each a unit cube size.He filled the bottom layer of a toy box with 15 wooden blocks.He then

kherson [118]

Its D 15+15+15= 45 so there for it will be 45

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3 years ago

You are constructing a concrete landing pad for a helicopter. You have 4704 cubic feet of concrete

Sonja [21]

Answer:

Round it to the nearest hundredth

Step-by-step explanation:

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3 years ago