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wariber [46]
4 years ago
13

Is -3.48 a rational number

Mathematics
1 answer:
8_murik_8 [283]4 years ago
5 0

A rational number is a number which can be expressed as a fraction whose numerator and denominator are both integers and whose denominator is not equal to zero. Rational numbers include all integers, fractions, mixed numbers, and some decimal numbers.

 

Note : All terminating and repeating decimal numbers are rational numbers because those numbers can be expressed as a fraction. On the other hand, a non repeating number and non terminating decimal, like square root of 2, is an irrational number.  


Convert \ -3.48 \ into \ a \ fraction 


-3.48 =  \dfrac{-3.48}{1}   Convert \ to \ fraction 


Multiply by 1 to eliminate two decimal places. 


Numerator = -3.48 * 10 * 10 = -348



Denominator  = 1 *10 * 10 = 100 


Our \ new \ fraction \ is \  \dfrac{-348}{100} 


The \ value \ is \ 0.034800000000000005


= Given \ value \ is \ Rational.

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Please help me with this question!!!!!
Naddika [18.5K]

Answer:

7/25

Step-by-step explanation:

θ lies in quadrant ii

so 2θ lies in quadrant iv

csc θ=5/3

sin θ=3/5 (sin θ=1/csc θ)

[cos(α+β)=cosαcosβ-sinαsinβ]

cos (2θ)=cos(θ+θ)=cos θ cos θ-sin θ sin θ=cos² θ-sin ²θ=1-sin²θ-sin²θ=1-2sin²θ

=1-2 (3/5)²

=1-2(9/25)

=1-18/25

=(25-18)/25

=7/25

5 0
3 years ago
Please help ASAP thank u!! :))
frozen [14]

Answer:

Use your brain

Step-by-step explanation:

6 0
3 years ago
A prime number less than 100 is selected randomly. what is the probability that its square has units digit $7$?
liberstina [14]
Any number ends with 0, 1, 2, 3, 4, 5, 6, 7, 8 or  9

Given any number. The square of this number is the last digit of square of the original numbers units digit.

For example

23*23 ends with 9 (3*3=9)

149*149 ends with 1 (9*9=81)

2564*2564 ends with 6 (4*4=16) 

and so on

so all the possible unit digits of a square number are {0, 1, 4, 5, 6, 9}

because:

0*0= 0 ; 1*1=1; 2*2=4; 3*3=9; 4*4=16; 5*5=25, 6*6=36; 7*7=49; 8*8=64, 9*9=81

Thus, the probability that the square of a number selected from any set of numbers being 7, is 0.


Answer: 0
 

4 0
3 years ago
Can you give an example of equations when you are given the constant of proportionality?
aleksandr82 [10.1K]
Example:
Proportionality=1
5=5x
Divide both sides by 5 , and you get 1=x,
so the proportionality is 1
6 0
3 years ago
To find the quotient 5/7 divided by 1/3 multiply..
cestrela7 [59]

Answer:

Multiply 5/7 by 3

Step-by-step explanation:

To find the quotient (division) multiply by the reciprocal. The reciprocal of 1/3 is 3.

8 0
4 years ago
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