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3 years ago

Whitch of thw following is a rational number plz help as soo. As posible if not sooner

Mathematics

2 answers:

Verizon [17]3 years ago

5 0

Answer:

1.425.

Step-by-step explanation:

1 .425 is the only one which can be written as a fraction ( 1425/ 1000).

π is a non repeating decimal which goes on without bounds.

So is √50 (try entering it on your calculator).

√-4 : there is no real number whose square root is negative.

slega [8]3 years ago

3 0

The answer to your question would be "B"

1.425

Rational numbers are numbers that can be turned into a fraction. Decimals, fractions, and integers are rational numbers.

"A" would be incorrect because there is no way to write $\pi$ as a simple fraction.

"C" would be incorrect because the square root of 50 is not a perfect square.

"D" would also be incorrect because it can not be turned into a fraction.

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Explain why the following answer is not correct: 1,000/5=2,000

Tatiana [17]

Well, 1000/5 would be smaller than 2000 not bigger. You are dividing into smaller pieces not multiplying into bigger ones.

7 0

3 years ago

A box contains 5 red balls, 6 white balls and 9 black balls. Two balls are drawn at

valina [46]

Answer:

$P(Same)=\frac{61}{190}$

Step-by-step explanation:

Given

$Red = 5$

$White = 6$

$Black = 9$

Required

The probability of selecting 2 same colors when the first is not replaced

The total number of ball is:

$Total = 5 + 6 + 9$

$Total = 20$

This is calculated as:

$P(Same)=P(Red\ and\ Red) + P(White\ and\ White) + P(Black\ and\ Black)$

So, we have:

$P(Same)=\frac{n(Red)}{Total} * \frac{n(Red) - 1}{Total - 1} + \frac{n(White)}{Total} * \frac{n(White) - 1}{Total - 1} + \frac{n(Black)}{Total} * \frac{n(Black) - 1}{Total - 1}$

<em>Note that: 1 is subtracted because it is a probability without replacement</em>

$P(Same)=\frac{5}{20} * \frac{5 - 1}{20- 1} + \frac{6}{20} * \frac{6 - 1}{20- 1} + \frac{9}{20} * \frac{9- 1}{20- 1}$

$P(Same)=\frac{5}{20} * \frac{4}{19} + \frac{6}{20} * \frac{5}{19} + \frac{9}{20} * \frac{8}{19}$

$P(Same)=\frac{20}{380} + \frac{30}{380} + \frac{72}{380}$

$P(Same)=\frac{20+30+72}{380}$

$P(Same)=\frac{122}{380}$

$P(Same)=\frac{61}{190}$

4 0

3 years ago

Rebecca and Tracy are cutting strips of fabric to make a quilt. Each strip of fabric needs to be 1/3 of a foot long. They have 1

Deffense [45]

48 strips of fabric.

6 0

3 years ago

The claim is that the white blood cell counts of adult females are normally distributed, with a standard deviation equal to 1.6

maxonik [38]

Answer:

78.46

Step-by-step explanation:

Given that

Pop. Standard deviation = 1.61

Sample standard deviation = 2.15

Sample mean = 7.47

Sample size = 45

Recall that

Test stat for chi square

= (n - 1) (sample standard dev/pop standard dev)^2

= 45 - 1 (2.15/1.61)^2

= 44(1.3354)^2

= 44 × 1.78329

= 78.46

4 0

3 years ago

Read 2 more answers

The local shelter decided to build an addition for cats hey borrowed $6300 from a local bank at a rate of 8% the high school hel

Zepler [3.9K]

Answer:

$378

Step-by-step explanation:

To find the interest that the shelter payed on this loan, we use the formula: $I=Prt$ .

P = $6,300

r = 8% or 0.08

t = 9/12

Now we substitute the values into our formula.

$I=Prt$ .

$I=6,300(0.08*\dfrac{9}{12})$

$I=6,300(0.08*0.75)$

$I=6,300(0.06)$

$I=$378$

So the shelter payed a total of $378 in interest to the bank.

3 0

3 years ago