1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
agasfer [191]
3 years ago
13

A computer password consists of six characters.a. How many different passwords are possible if each character may be any lowerca

se letter or digit, and at least one character must be a digit? Please enter your result in scientific notation, making sure the answer in the left box is between 1 and 10.b. A computer system requires that passwords contain at least one digit. If six characters are generated at random, and each is equally likely to be any of the 26 letters or 10 digits, what is the probability that a valid password will be generated?
Mathematics
1 answer:
Citrus2011 [14]3 years ago
5 0

Answer:

a) 6.04661760*10^8

b) 0.27778

Step-by-step explanation:

a)

There are 26 lowercase letters and 10 digits.  

The character that must be a digit can be generated in 10 different ways and the others, in 26+10=36 different ways.

Since the password is 6 characters long, by the Fundamental Rule of Counting there are

10*36*36*36*36*36 = 604,661,760

In scientific notation this number can be expressed as

6.04661760*10^8

b)

By the <em>Fundamental Rule of Counting</em>, there would be  

36^6

different combinations of 6 characters, but only the number computed in a) are valid combinations, so the probability of generating a valid password is

\displaystyle\frac{10*36^5}{36^6}=\displaystyle\frac{10}{36}=0.27778

You might be interested in
wren and jenni are reading the same book. wren is on page 14 and reads 2 pages every night. jenni is on page 6 and reads 3 pages
Ratling [72]
If Jenni get one page closer to Wren every night and Wren has read 8 more pages then is will take Jenni 8 more nights to catch up to Wren. They will be on page 30 in their book.
4 0
3 years ago
What is the value of
jasenka [17]

Answer

My answer is in the photo above

7 0
3 years ago
If t=(23 -38 17 -6), then what is -10(t)? I WILL GIVE BRAINLIEST
laiz [17]

Answer:Piqued the same time.you should come over to the same time as before I have to take the

Step-by-step explanation:

I ooo

8 0
3 years ago
Lin uses an app to graph the charge on her phone.
exis [7]

Answer:

  • See below

Step-by-step explanation:

<u>Use the graph to answer the following questions:</u>

When did she start using her phone?

  • At 2 afternoon

When did she start charging her phone?

  • At 8 afternoon

While she was using her phone, at what rate was Lin’s phone battery dying?

<u>From 100% to 40% between 2PM and 4 PM:</u>

  • (100 - 40)/(4 - 2) = 60/2 = 30% per hour
8 0
2 years ago
Read 2 more answers
Write the times of four trains as 12 hr. clock<br> a. 14:32<br> b. 16:30<br> c. 06:45<br> d. 10:29
romanna [79]

Answer:

a 2:32

b 4:30

c 6:45

d 10:29

6 0
2 years ago
Other questions:
  • Jeff has 4 red pens and 2 blue pens in his backpack. He also has 1 yellow highlighter and 4 green highlighters in his
    9·2 answers
  • the ratio of men to women in a certain factory is 3 to 4. There are 198 men. How many workers are there?
    15·1 answer
  • In triangle JKL, solve for x
    14·2 answers
  • Simplify -2(-4x + 5)
    9·1 answer
  • Can someone please help me with the question in the image. If correct i will mark as brainliest answer
    11·1 answer
  • What dose this equal -7/8+(-5/8)
    12·2 answers
  • Simplyfly (-56) divided bye 7
    6·2 answers
  • A company logo is a red parallelogram. A large version of the logo is painted on a rectangular billboard that has a base of 10 f
    11·2 answers
  • Jose is 35 years old, and makes $40,000 per year. If he dies, how much would the beneficiaries of his life insurance policy rece
    8·2 answers
  • A simple random sample of 40 recorded speeds (in mi/h) is obtained from cars traveling on a specific highway. The sample has a m
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!