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3 years ago

Easy 20 points please tell me if I got it right and if not please tell me the right answer

Mathematics

1 answer:

mash [69]3 years ago

3 0

Answer:

No, you are not correct.

It should look like this:

Prefer colorful decorations Prefer neutral decorations

Pay attention 20 25

to fashion

Do not pay

attention to 72 33

fashion

Step-by-step explanation:

33 is 22% of 150. In the question it states that 70% of people do not pay attention to fashion. We need to find the other 48% here. In order to do that we multiply .48 by 150. That gets us 72. To check that answer you can add both 72 and 33 and then divide by 150, which gets 70%.

To get the amount of people that prefer neutral decorations and pay attention to fashion we need to add up 20 + 72 + 33 and that equals 125. Next, we take 150 and minus 125 of it to get 25.

Hope this helps!!

- Kay :)

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Communicate Mathematical Ideas Irrational numbers can never be precisely represented in decimal form. Why is this? 20 Unit1

kiruha [24]

Answer:

An irrational number can never be represented precisely in decimal form.

Step-by-step explanation:

A number can be precisely represented in decimal form if you can give a rule for the construction of its decimal part,

for example:

2.246973973973973... (an infinite tail of 973's repeated over and over)

7.35 (a tail of zeroes)

If this the case, then the number is a RATIONAL NUMBER, i.e, the QUOTIENT OF TWO INTEGERS.

Let's show this for the first example and then a way to show the general situation will arise naturally.

Suppose N = 2.246973973973...

You can always multiply by a suitable power of 10 until you get a number with only the repeated chain in the tail

for example:

1) $N.10^3=2246.973973973...$

but also

2) $N.10^6=2246973.973973...$

Subtracting 1) from 2) we get

$N.10^6-N.10^3=2246973.973973973... - 2246.973973973...$

Now, the infinite tail disappears

$N.10^6-N.10^3=2246973 - 2246=226747$

But

$N.10^6-N.10^3=N.(10^6-10^3)=N.(1000000-1000)=999000.N$

We have then

999000.N=226747

and

$N=\frac{226747}{999000}$

We do not need to simplify this fraction, because we only wanted to show that N is a quotient of two integers.

We arrive then to the following conclusion:

If an irrational number could be represented precisely in decimal form, then it would have to be the quotient of two integers, which is a contradiction.

So, an irrational number can never be represented precisely in decimal form.

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Dennis_Churaev [7]

Answer:

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Step-by-step explanation:

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