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
schepotkina [342]
3 years ago
12

Which of the following numbers is rational? A. 4/5 B.√27 C.4.020020002000002.... D.√31​

Mathematics
2 answers:
koban [17]3 years ago
4 0
Hey buddy its easy
Answer is C part
chubhunter [2.5K]3 years ago
3 0

<em>Greetings from Brasil...</em>

First let's define the rational number....

→ Division between two numbers with the detail that the dividend or denominator cannot be zero

A/B or A ÷ B

where B ≠ 0

<em>(just for the sake of knowledge. If B = 0 we would have +∞ as an answer)</em>

<em>A ∈ ℤ</em>

<em>and</em>

<em>B ∈ ℤ*   (B ≠ 0)</em>

In this way, when dividing A by B, we will obtain a whole number or a number with a decimal (finite decimal or periodic tenth)

Let's go to the alternatives

<h3>A = 4/5 = 0,8 <em> (finite decimal)</em></h3>

4 ∈ ℤ and 5 ∈ ℤ*, so we have a rational number

B = √27 = 5.1961524227066318805823390245176

(There is no repetition of tithing periods (numbers after the point) - non-periodic tithe). So we have an Irrational Number

C = 4.020020002000002

There is no periodic tenth - Irrational Number

D = √31 = 5.5677643628300219221194712989185

Irrational Number - Non-periodic tithe

You might be interested in
the price of one share of ABC company decreased a total of $45.75 in 5 days what was the acerage change of the price of one shar
yulyashka [42]

Just divide 40 divided by 5 and you should get $9.15
8 0
3 years ago
Read 2 more answers
Find the surface area of the sphere.
fenix001 [56]

Answer:

804 in^2

Step-by-step explanation:

The surface area of a sphere is given by A = 4πr^2, where r is the radius of the sphere.

Here, A = 4π*8^2 in^2 (must use units of measurement)

              =256π in^2, or approximately 804 in^2

4 0
3 years ago
Read 2 more answers
What is the magnitude of the vector 12 - 5i?
Monica [59]

Answer:

the magnitude is 7

Step-by-step explanation:

as i means unit vector along x-axis so the magnitude of i is 1 and now,

= 12 - 5×1

= 12- 5

= 7

4 0
3 years ago
Limit as x approaches 9 of x^2 -81/sqrt of x - 3
Ipatiy [6.2K]

Answer:

108

Step-by-step explanation:

Limit as x approaches 9 of x^2 -81/sqrt of x - 3

First substitute x into the expression

= 9²-81/√9 - 3

= 81-81/3-3

= 0/0 (indeterminate)

Apply l'hospital rule

= lim x -> 9 d/dx(x²-81)/√x - 3

= lim x -> 9 2x/1/2√x

Substitute x = 9

= 2(9)/1/2√9

=18/1/(2(3)

=18 × 6/1

= 108

Hence the limit of the function is 108

7 0
3 years ago
Sara spent half of her allowance going to the movies. She washed the family car and earned 9 dollars. What is her weekly allowan
Genrish500 [490]
$7, I think. I would not be too sure about it, though.
3 0
3 years ago
Read 2 more answers
Other questions:
  • A company is about to launch a new cell phone model. In the past, 40% of its cell phones have launched successfully. Before any
    13·2 answers
  • The Henderson family and the Tran family each used their sprinklers last summer. The Henderson family's sprinkler was used for 1
    7·1 answer
  • Consider the function g(x) =-3(x-2) 2 + 3 what is the vertex
    11·1 answer
  • Solve tan x - square root 1-2tan^2x=0 given that 0 degrees &lt; x&lt;360degrees
    12·2 answers
  • Which of the following statements are true for using proportions to solve for missing measures? Select three options.
    15·2 answers
  • What is the value of 7 in the number 8975
    6·2 answers
  • Which of the equations below could be the equation of this parabola? (0, 0) A. x= - 1 / 4y² B. x=-1/4x2 C. x=1/4y2 D. x=1/4x2​
    11·1 answer
  • 0.00098421, in standard notation to scientific notation
    5·1 answer
  • The graph of a linear function is shown on the
    12·1 answer
  • Write the equation of a line that passws through the point (1,7) and is perpendicular to y=1/2x-5
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!