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masha68 [24]
3 years ago
15

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

h character is either a lowercase letter, (a, b, c, etc), an uppercase letter (a, b, c, etc) or a numerical digit (0, 1, 2, 3, 4, 5, 6, 7, 8, or 9). assume that the hacker makes random guesses.
Mathematics
1 answer:
STALIN [3.7K]3 years ago
6 0
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)
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You measure 33 backpacks' weights, and find they have a mean weight of 36 ounces. Assume the population standard deviation is 12
saul85 [17]

Answer:

E=3.4363

Step-by-step explanation:

#Given a significance level of \alpha=1-CI=1-0.90=0.1 and

\bar x=36, \ \sigma=12.1 \ n=41, the critical value is,z_\alpha_/_2=z_\alpha_/_0_._0_5=1.645

#the margin of error can then be calculated as:

E=z_\alpha_/_2\times\frac{\sigma}{\sqrt n}=1.645\times \frac{12.1}{\sqrt 33}\\\approx 3.4363

Hence the margin of error is 3.4363

8 0
3 years ago
True or false, If false what would the correct term be?
LiRa [457]

Answer: False

This is describing the angle of depression. The angle of elevation would have the object be above the observer.

4 0
3 years ago
1.2+3x6= <br> 2.4(8-3)=<br> 3.7+8(3+2)= <br> 4. (6-5)+(8x10)=
Irina18 [472]

Answer:

1.2 + 3x6 = 19.2

2.4(8-3) = 11.25

3.7 + 8 (3 + 2) = 43.7

4(6 - 5) + (8 x 10) = 84

Hope this helps!

Have a great day

7 0
2 years ago
Read 2 more answers
Plz help in the picture below plz ill give you brainliestt
nexus9112 [7]

change both the fractions to improper fractions. the area will be 147/4 , and the width will be 9/2 . with both of these you may now divide, (147/4) / (9/2)

remember to use the KCF when dividing fractions.

147 * 2 = 294

4 * 9 = 36

your new fraction will be 294/36 .... which it is also 8 1/6

6 0
3 years ago
1. Which of these transformations are isometries? The diagrams are not drawn to scale.
lisov135 [29]

In math, an isometry is a congruent transformation in which the distance (or length) and the angle is preserved or remains the same even after the transformation.

The transformation can be translation, rotation, reflection, etc.

Let us not use this definition of isometry to answer our question, one at a time.

(I) In here, as we can see the distances 10 and 5 and the angle 43 degrees has been preserved. So, <u>this is an isometry.</u>

(II) In here, distances have been halved, so this is<u> not an isometry</u>, even though the angles have been preserved.

(III) In here, the corresponding distances and the angles have been preserved. So, <u>this is an isometry.</u>

6 0
3 years ago
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