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
Arturiano [62]
3 years ago
8

An email spam reaches three readers. Each of them forwarded the same email to three different readers. Each of these new readers

further forwarded the same email to three different readers, who each forwarded the same email to yet again three different readers. How many people have read that email?
81
120
243
363
Mathematics
2 answers:
Deffense [45]3 years ago
8 0

Answer: Second Option is correct.

Step-by-step explanation:

Since we have given that

Number of readers = 3

Each of them forwarded the same email to number of readers = 3

So, our equation becomes

3+9

Similarly, each of them again forwarded the same email to number of readers = 3

So, our equation becomes

3+9+27

Again each of them forwarded the same email to number of readers = 3.

So, our equation becomes

3+9+27+81

So, Number of people have read that email is given by

3+9+27+81=120

Hence, Second Option is correct.

SOVA2 [1]3 years ago
7 0

Answer:120

Step-by-step explanation:

3+9+27+81

You might be interested in
Prove the trigonometric identity. Show your work on the left hand side, or right hand side, or both.
yanalaym [24]
\bf sin^2(\theta)+cos^2(\theta)=1\implies sin^2(\theta)=1-cos^2(\theta)\\\\
\textit{also recall that }\qquad \textit{difference of squares}
\\\\
(a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)\\\\
-------------------------------\\\\
sin^4(x)-cos^4(x)=2sin^2(x)-1\\\\
-------------------------------\\\\
sin^4(x)-cos^4(x)\implies [sin^2(x)-cos^2(x)][sin^2(x)+cos^2(x)]
\\\\\\\
[sin^2(x)-cos^2(x)][1]\implies sin^2(x)-cos^2(x)
\\\\\\
sin^2(x)-[1-sin^2(x)]\implies sin^2(x)-1+sin^2(x)\implies 2sin^2(x)-1
5 0
4 years ago
<img src="https://tex.z-dn.net/?f=%20%7B7%7D%5E%7B%20-%202%7D%20%20%7B%28%20-%203%29%7D%5E%7B2%7D%20" id="TexFormula1" title=" {
r-ruslan [8.4K]

Answer:

Step-by-step explanation:

\frac{1}{7^{2} } *9=\frac{1}{49} *9=\frac{9}{49}

3 0
3 years ago
Read 2 more answers
Without a calculator, order the following expressions from least to greatest. 9, pie squared, 3 times pie??
Elden [556K]
We have 9, 9.86, 9.42
So in order from least to greatest it would be: 9, 3 times pi, pi squared
5 0
2 years ago
How much chromium-51 will be left after 7 months?
Makovka662 [10]

Answer:

It seems there's more information in you question that you haven't posted.

7 months = 7 * (365/12) = 213 days

The half-life of chromium 51 is 27.7 days.

After 7 months, chromium 51 will have undergone 7.69 half-lives.

To solve for the ending amount we'll use the formula:

Ending Amount = Beginning Amount / 2^n where 'n' = # of half-lives

We'll say the beginning amount =1

Ending Amount = 1 / 2^7.69

Ending Amount = 0.0048426082

Basicaly if you started with 1 gram of chromium 51, after 7 months you would have 0.0048426082 grams.

Source: https://www.1728.org/halflife.htm

Step-by-step explanation:

6 0
3 years ago
How do you solve this question and what is y and x?
Sonbull [250]
32+90+8y-6=180 solve that equation and that should be your answer
5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the slope of this line?<br> Enter your answer as a fraction in the simplest term in the box.
    9·1 answer
  • Which pair of numbers is 6 a common factor of?
    9·1 answer
  • Diagram not drawn to scale<br> please helppp
    5·1 answer
  • Need help with my school
    6·1 answer
  • Which fractions have a LCD of 30?
    11·2 answers
  • Can someone tell me why is nobody helping me in this app come on y’all help
    6·1 answer
  • Help ASAP please! I need the correct answer.
    8·1 answer
  • 3.
    5·1 answer
  • Y = x - 3<br> (find the slope and y- intercept)
    15·2 answers
  • A) Jeremy goes on holiday. He parks his car in the
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!