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3 years ago

9

5. A pair of jeans costing

1 answer:

Levart [38]3 years ago

6 0

So $39.50 is the price when you are paying full price, which can be represented by 100%. If you’re paying 25% less, than you are only paying 75% of the original price. Simply multiply $39.50 by 75%(expresses as 0.75) to determine the sale price. 39.50(.75)=29.62 The closest value to that is $29.50, so D is the answer.

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What is the unit rate of the table?

GREYUIT [131]

the rate is 9 because it goes up 9

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3 years ago

In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead. Construct a 95% conden

S_A_V [24]

Answer:

The 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is (0.472,0.766).

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 $1 - \frac{\alpha}{2}$ .

In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead.

This means that $n = 42, \pi = \frac{26}{42} = 0.619$

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 $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.619 - 1.96\sqrt{\frac{0.619*0.381}{42}} = 0.472$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.619 + 1.96\sqrt{\frac{0.619*0.381}{42}} = 0.766$

The 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is (0.472,0.766).

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3 years ago

Katie has 8 roses. she gives 4 of her roses to her mother. What fraction of her roses does she give to her momther?

ira [324]

$\frac{4}{8} = \frac{2}{4} = \frac{1}{2}$

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4 years ago

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Answer:

6,802

Step-by-step explanation:

76 6,802

-- = ---

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Multiply 8950 times 76, then divide 680,200 by 100, which equals 6,802.

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4 years ago

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Lady bird [3.3K]

Answer:

9. B 10. A 11. B 12. A

Step-by-step explanation:

use slope intercept form

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3 years ago

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