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2 years ago

(21) +(61/1,000) write in standard form

Mathematics

1 answer:

Pani-rosa [81]2 years ago

7 0

Multiply and add it up and you got ur answer

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$3.18

Explanation: I am a cashier hahaha

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What is equivalent to (4+5i)(4-5i)

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(4+5i)(4-5i)=(4)²-(5i)²=16-25(i)²=16-25(-1)=16+25=41

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A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true prop

Katyanochek1 [597]

Answer: $(0.367,\ 0.473)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

, where $\hat{p}$ is the sample proportion, n is the sample size , $z_{\alpha/2}$ is the critical z-value.

Given : Significance level : $\alpha:1-0.99=0.01$

Sample size : n= 85

Critical value : $z_{\alpha/2}=2.576$

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Now, the 99% confidence level will be :

$\hat{p}\pmz_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.42\pm(2.576)\sqrt{\dfrac{0.42(1-0.42)}{85}}\\\\\approx0.42\pm0.053\\\\=(0.42-0.053,\ 0.42+0.053)=(0.367,\ 0.473)$

Hence, the 99% confidence interval estimate of the true proportion of families who own at least one DVD player is $(0.367,\ 0.473)$

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2 years ago

What is 2x+3y=17 if y=-3

laila [671]

Answer:

x = 13

Step-by-step explanation:

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One of Andre's seldom-used credit cards has been stolen without his knowledge. When he gets his monthly statement, he realizes t

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Answer:

The maximum amount of the unauthorized purchases he is he liable for is: $50.

Step-by-step explanation:

Andre realizes that someone else has been using the card and reports it stolen.

So, the maximum amount of the unauthorized purchases he is he liable for is: $50.

There is a provision under the Truth in Lending Act, that if your card is stolen and any charges are incurred on it, and you report this to the card company, then you do not have to pay for that.

The most one will have to pay for unauthorized charges is $50, even if there is hundreds of dollars of bill.

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(2*1) +(6*1/1,000) write in standard form

(21) +(61/1,000) write in standard form