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4 years ago

Place 145 in the place value chart

Mathematics

2 answers:

Alexandra [31]4 years ago

8 0

Answer: The 1 goes in the hundreds place and the 4 goes in the tens place and the 5 goes in the ones place

Step-by-step explanation:

Gnesinka [82]4 years ago

8 0

Answer:

145

1|4|5

-100+40+5

Step-by-step explanation:

ฅ^•ﻌ•^ฅ

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3 years ago

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Natasha_Volkova [10]

Answer:

Sample size of 586 or higher.

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 is:

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

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 $Z = 1.96$ .

What sample size could be 95% confident that the estimated (sample) proportion is within 4 percentage points of the true population proportion?

Sample size of at least n when $M = 0.04$

42.1% of women-owned businesses provided retirement plans contributions, which means that $p = 0.421$ . So

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

$0.04 = 1.96\sqrt{\frac{0.421*0.579}{n}}$

$0.04\sqrt{n} = 0.9677$

$\sqrt{n} = \frac{0.9677}{0.04}$

$\sqrt{n} = 24.19$

$\sqrt{n}^{2} = (24.19)^(2)$

$n = 585.2$

We need a sample size of 586 or higher.

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Answer:

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3 years ago

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Emily wants to plant flowers in an area with angular but that is 1 foot by 4.5 ft. the flowers she wants to plant need to be spa

lukranit [14]

Using the perimeter of the rectangle, it is found that she should buy at most 16 plants.

---------------------------

The perimeter of a rectangle of length l and width w is given by:

$P = 2(l + w)$

In this question, the perimeter is of 1 ft by 4.5, thus, $l = 1, w = 4.5$ , and the perimeter is:

$P = 2(1 + 4.5) = 2(5.5) = 11$

Perimeter of 11 ft.
The plants will be at least 8 inches = 2/3 feet apart along the perimeter, thus:

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Applying cross multiplication:

$\frac{2x}{3} = 11$

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$x = \frac{33}{2}$

$x = 16.5$

At least 8 inches apart(can be more), thus she should buy at most 16 plants.

A similar problem is given at brainly.com/question/10489198

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