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irakobra [83]
3 years ago
6

If a car factory checks 360 cars and 8 have defects, how many will have defects out of 1260?

Mathematics
1 answer:
saul85 [17]3 years ago
6 0

Answer:

We can expect  28  defected cars.

Step-by-step explanation:

Let us assume that the defected cars are  "uniformly distributed"  in the total set of cars.

Then we can write the proportion  8%2F360 = x%2F1260  for the unknown amount  x  of defected cars among  1260  cars.

Solving the proportion for  x  you get

x = 8%2A1260%2F360 = 8%2A3.5 = 28.

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Classify the numbers as rational or irrational
Morgarella [4.7K]

Answer:

-\sqrt{13} = Irrational

43.95 (repeat sign) = Rational

-3π = Irrational

-√49 = Rational

6/15 = Rational

Step-by-step explanation:

Note:

A rational number can be defined as any number that can be expressed or written in the p/q form, where 'p' and 'q' are integers and q is a non-zero number. An irrational number on the other hand cannot be expressed in p/q form and the decimal expansion of an irrational number is non-repeating and non-terminating.

-----------------------------------------------------------------------------------------------------------

The square root of a negative number is imaginary.

Natural Number Test

A number is natural if it is one of the counting numbers (greater than 0), i.e., 1,2,3,4,5,...

Since NAN is not both positive and a counting number, NAN is not a natural number

Whole Number Test:

Whole Numbers are positive numbers, including 0, with no decimal or fractional parts

Since NAN is not both ≥ 0 and an integer, NAN is a not a whole number

Integer Test

The number is an integer if it is a whole number (no fractions or decimals) positive or negative including the number 0, ...,-5,-4,-3,-2,-1,0,1,2,3,4,5,...

Since NAN is not a positive or negative number (no decimals or fractions), NAN is not an integer

Rational Number Test

The number NAN is rational if it is an integer or decimal

A rational number is a number that can be represented a/b where a and b are integers and b is not equal to 0.

Irrational Number Test:

An irrational number is a number that cannot be expressed as a ratio between two integers and is not an imaginary number.

Since NAN is the square root of a negative number, it is imaginary

Imaginary Numbers are not rational

Imaginary

----------------------------------------------------------------------------------------------------------

43.95 ⇒ With repeat sign over 43.95

The decimal places repeat an infinite amount of times and when a decimal repeats it's rational.

-----------------------------------------------------------------------------------------------------------

Pi is a Greek letter (π), and one of the most well-known mathematical constants.

It is the ratio of a circle's circumference to its diameter which is always constant.

pi (π) approximately equals 3.14159265359... and is a non-terminating non-repeating decimal number.

Hence 'pi' is an irrational number.

Any number with pi is considered irrational.

----------------------------------------------------------------------------------------------------------

The square root of a negative number is imaginary.

Natural Number Test

A number is natural if it is one of the counting numbers (greater than 0), i.e., 1,2,3,4,5,...

Since NAN is not both positive and a counting number, NAN is not a natural number

Whole Number Test:

Whole Numbers are positive numbers, including 0, with no decimal or fractional parts

Since NAN is not both ≥ 0 and an integer, NAN is a not a whole number

Integer Test

The number is an integer if it is a whole number (no fractions or decimals) positive or negative including the number 0, ...,-5,-4,-3,-2,-1,0,1,2,3,4,5,...

Since NAN is not a positive or negative number (no decimals or fractions), NAN is not an integer

Rational Number Test

The number NAN is rational if it is an integer or decimal

A rational number is a number that can be represented a/b where a and b are integers and b is not equal to 0.

Irrational Number Test:

An irrational number is a number that cannot be expressed as a ratio between two integers and is not an imaginary number.

Since NAN is the square root of a negative number, it is imaginary

Imaginary Numbers are not rational

Imaginary

But is rational as it equals -7.

----------------------------------------------------------------------------------------------------------

Rational because the decimal terminates:

6/15 = 0.4/0.40...

4 0
2 years ago
Read 2 more answers
Kristi is the food manager of a summer camp. Each day, the kids at the camp get a choice of a pizza, chicken nuggets, fish, or s
Ad libitum [116K]

Answer:

Kristi's prediction is not valid. The probability of a kid choosing a fish plate is about 21%.

Step-by-step explanation:

I took the test ✌

8 0
3 years ago
Could someone please help with this question
Citrus2011 [14]
13/19 = 65/95 that's your answer
5 0
3 years ago
Round to the nearest tenth 0.12
Oksana_A [137]
0.12 rounded to the nearest tenth is 0.1
8 0
2 years ago
Read 2 more answers
Easy question, A group of 8 friends go to the movies. A bag of popcorn costs $2.99. How much will it cost to get one bag of popc
puteri [66]

Answer:

$23.92

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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