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3 years ago

If I have 2 sticks of butter and need 2. How much do I need???

Mathematics

2 answers:

Wewaii [24]3 years ago

7 0

You just stated how much you need. You need 2.

matrenka [14]3 years ago

5 0

You need two, you just stated whta you needed

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A hacker is trying to guess someone's password. the hacker knows (somehow) that the password is 12 characters long, and that eac

STALIN [3.7K]

Determine first the places that will be filled:

26 + 26 + 10 = 62 ways

The number of possible passwords is limited to 12 characters
Thus,

= 62^12 (assume that repetition is allowed)

The probability of guessing correctly =

(1/62)^12
= 3.099557704 x 10^-22 (note that it is in scientific notation form)

6 0

3 years ago

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:

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

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.

6 0

3 years ago

Find the area of the triangle. Enter your answer in the box.

BlackZzzverrR [31]

The answer is 12 m2
Explanation: