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3 years ago

Please help asap!!! copy and complete

Mathematics

2 answers:

Iteru [2.4K]3 years ago

3 0

Answer:

Decreased by 20%

Step-by-step explanation:

Just add the 10%+10% to get the answer.

melisa1 [442]3 years ago

3 0

Answer: decreased by 20%

Step-by-step explanation:

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Hey everybody I have a quick math question but idk what the answer is! It would mean a lot if someone helped me. PS the pic is t

mote1985 [20]

Answer:

it would be 2.33 I divided it I hope I'm right :)

8 0

2 years ago

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

Natasha_Volkova [10]

Answer:

P(2)=0 then x-2 is a factor of P(x)

Step-by-step explanation:

To see if (x-2) is a factor just plug in 2 for x into the polynomial expression.

2(2)^3-3(2)^2-17(2)+30

2(8)-3(4)-34+30

16-12-34+30

4-34+30

-30+30

Since P(2)=0 then x-2 is a factor

8 0

2 years ago

Express 4.009 x 10-3 in decimal form.

Shalnov [3]

Answer:

0.004009

Step-by-step explanation:

I think that's the answer

7 0

2 years ago

A researcher would like to estimate the proportion of all children that have been diagnosed with Autism Spectrum Disorder (ASD)

aliina [53]

Answer:

The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence interval $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$ is the margin of error.

95% confidence interval

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $z = 1.96$ .

We have that:

$M = 0.02, \pi = 0.0147$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.02 = 1.96\sqrt{\frac{0.0147*(1-0.0147)}{n}}$

$0.02\sqrt{n} = 0.2359$

$\sqrt{n} = 11.79$

$n = 139.1$

The researcher should use a sample size of at least 140 children to get a margin of error to be within 2%.

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3 years ago

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Just do it _/ ! i will give you brainlist

forsale [732]

Answer:

Step-by-step explanation:

7 0

2 years ago

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