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3 years ago

There are 870 people attending a conference.if 8.9% were canda how many people is this

Mathematics

2 answers:

nasty-shy [4]3 years ago

8 0

Answer:

77.43 people were canda

Step-by-step explanation:

To find 8.9% of 870, we first turn 8.9% into a decimal. We can do this by shifting the decimal point two places to the left. This gives us 0.089. Now, we multiply this decimal by 870. Our product, 77.43, is our final answer.

zhuklara [117]3 years ago

7 0

Answer:

77.43

Step-by-step explanation:

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in a poll about work, 62% of respondents said that their jobs were sometimes or always stressful. twelve workers are chosen at r

Sladkaya [172]

The mean and standard deviation of number who find their jobs stressful are 7.44 and 1.6814 respectively.

Given,

number of workers chosen , n=12

percentage of respondents =62%

from given data the calculation are done according to binomial distribution,

then,

probability of respondents , $p=\frac{62}{100}=0.62$

a)calculating mean,

$\mu=n*p\\\\\mu=12*0.62\\\\\mu=7.44$

b)calculating standard deviation,

$\sigma=\sqrt{n*p*(1-p)}\\\\\sigma=\sqrt{12*0.62*(1-0.62)}\\\\\sigma=\sqrt{7.44(0.38)}\\\\\sigma=\sqrt{2.8272}\\\\\sigma=1.6814$

Thus, the mean and standard deviation of number who find their jobs stressful are 7.44 and 1.6814 respectively.

To learn more about binomial distribution refer here

brainly.com/question/15303817

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8 0

1 year ago

What is 16 divided by X^2 equals 8 divided by X + 6?

zaharov [31]

Solve: $\frac{16}{x^{2}} = \frac{8}{x + 6}$

$\frac{16}{x^{2}} = \frac{8}{x + 6}$

$\text{Cross multiply: } 16(x + 6) = 8x^{2}$
$\text{Simplify: } 2(x + 6) = x^{2}$
$\text{Expand: } 2x + 12 = x^{2}$

$\text{Solve for x: } x^{2} - 2x - 12 = 0$

$\text{Use the quadratic equation: } x = \frac{-b \pm \sqrt{b^{2} - 4ac}}{2a}$
$x = \frac{2 \pm \sqrt{4 + 48}}{2}$
$x = \frac{2 \pm \sqrt{52}}{2}$
$x = \frac{2 \pm \sqrt{13 \cdot 4}}{2}$

$x = \frac{2 \pm 2\sqrt{13}}{2}$
$\therefore x = 1 \pm \sqrt{13}$

7 0

3 years ago

Factor x^4 + xy^3 + x^3 + y^3. Hint, first factor a monomial. Please explain why!!!

almond37 [142]

Pull an x from the first two terms

x(x^3 + y^3) + (x^3 + y^3) Now x^3 + y^3 is a common factor.

(x^3 + y^3)*(x + 1) That should be far enough. It can be factored further by factoring (x^3 + y^3) but there is no point because you can't do anything after that. But in case you want to know how x^3 + y^3 factors

(x^3 + y^3) = (x + y)(x^2 - xy + y^2)

Which means you could write original polynomial as

(x + y)(x^2 - xy + y^2)(x + 1)

Part B

You factored the x out of xy^3 so that you would have a common factor (x^3 + y^3) to pull out as a common factor for the whole polynomial.

3 0

3 years ago

2p + 14 = 0 what is p?

Thepotemich [5.8K]

Answer: -7

Step-by-step explanation:

P=-14/2

P=-7

6 0

3 years ago

Read 2 more answers

Which expressions are solutions to the equation 3/4 x = 15?

algol [13]

I think so C is correct
Because is true.

7 0

3 years ago