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3 years ago

R-23 for r= 32 what is the answer

Mathematics

1 answer:

Vera_Pavlovna [14]3 years ago

7 0

Answer:

The answer is 9.

Step-by-step explanation:

If r=32, all you do is plug 32 where the r is

32-23=9 as your answer.

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Y= 2x-8,what is the slope and the y-intercept

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Hi is the answer so this makes it okay to do thing when you have it

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3 years ago

after allowing 15% discount on the price of an article and 13% bat was live and the remaining amount in the price of article bec

Eduardwww [97]

Answer:

14000

Explaination:

spwithvat = sp without vat + 13% of sp without vat

let, sp without vat be x.

sp with vat= x + 13% of x.

or, 13447 = x + 13/100 × x

or, 1344700 = 113x

or, x= 1344700/113

x = 11900

Let, mp be y.

sp with vat = mp - 15% of mp

or, 11900 = y - 15/100 × y

or, 1190000 = 85y

or, y= 1190000/85

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3 years ago

A machine that produces a major part for an airplane engine is monitored closely. In the past, 10% of the parts produced would b

nata0808 [166]

Answer:

With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is of at least 216.

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 level of $1-\alpha$ , 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 $1 - \frac{\alpha}{2}$ .

The margin of error:

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

For this problem, we have that:

$p = 0.1$

95% confidence level

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

With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is

We need a sample size of at least n, in which n is found M = 0.04.

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

$0.04 = 1.96\sqrt{\frac{0.1*0.9}{n}}$

$0.04\sqrt{n} = 0.588$

$\sqrt{n} = \frac{0.588}{0.04}$

$\sqrt{n} = 14.7$

$(\sqrt{n})^{2} = (14.7)^{2}$

$n = 216$

With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is of at least 216.

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3 years ago

The radius of this ball is 15 inches. Which equation gives the ball's surface area, in square inches?

lilavasa [31]

Best to look up the formula for the surface area of a sphere and then find it:

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A = 4π(15 in)^2 = 4(3.14)(225 in^2) = 2826 in^2 (answer)

This is represented by the formula given in the lower left.

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3 years ago

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WINSTONCH [101]

I can't help without a question.

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3 years ago