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Rom4ik [11]
2 years ago
9

What is the rational number equivalent to 1.28?

Mathematics
1 answer:
shusha [124]2 years ago
6 0

Answer: 1 28/100 or 1 7/25

Step-by-step explanation:

You might be interested in
The average weight of a chicken egg is 2.25 ounces with a standard deviation of 0.2 ounces. You take a random sample of a dozen
n200080 [17]

Answer:

P(\bar X

P(\bar X

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent interest on this case, and for this case we know the distribution for X is given by:

X \sim N(\mu,\sigma)  

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

On this case  \bar X \sim N(2.25,\frac{0.2}{\sqrt{12}})

Solution to the problem

We want this probability:

P(\bar X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X

P(\bar X

5 0
3 years ago
Simplify 8-(-5) - 4(-7).<br> О-63<br> оо ООО
Sergeeva-Olga [200]
8- (-5) - 4 (-7) = 41
3 0
3 years ago
Jane made a door frame for the house but does not have a tool to measure the angles. How can she check that the corner is 90 deg
Marina CMI [18]

Answer:

don't know sorry

Step-by-step explanation:

dont know sorry

5 0
3 years ago
Which property can you use to simplify (4+10)+(-10)
Anarel [89]

Answer:

Associative property of addition

Step-by-step explanation:

(4+10)+(-10)

We want to change the parentheses to

4 + ( 10 + -10)

We can use the Associative property of addition

( a+b) + c = a+ ( b+c)

6 0
3 years ago
Read 2 more answers
Help ASAP!! Geometry -
horrorfan [7]

Answer:

x = 9.27 cm

Volume = 289.2 cm³

Step-by-step explanation:

SA = Surface Area

SA = 229.2 cm²

P = Perimeter of Base

P = 3(6)

P = 18 cm

H = Height of Solid

H = x

A = Area of Base(Equilateral Triangle)

A = 6²√3 / 4

A = 36√3 / 4

A = 9√3

A = 9(1.732)

A = 31.176

A = 31.2 cm²

SA = Surface Area

SA = PH + 2A

229.2 = 18x + 2(31.2)

229.2 = 18x + 62.4

229.2 - 62.4 = 18x

166.8 = 18x

9.266 = x

9.27 = x

x = 9.27 cm

V = Volume

V = AH

V = 31.2(9.27)

V = 289.224

V = 289.2 cm³

8 0
2 years ago
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