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3 years ago

How many times does 21 go into 221 evenly

Mathematics

1 answer:

Bas_tet [7]3 years ago

5 0

21 goes into 221 about 10 times
21x10=210

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Holy god just please help me will give brainliest no links

Basile [38]

Answer:

7inches x 6inches x 4 inches

Step-by-step explanation:

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2 years ago

A door delivery florist wishes to estimate the proportion of people in his city that will purchase his flowers. Suppose the true

zloy xaker [14]

Answer:

The probability that the sample proportion will differ from the population proportion by greater than 0.03 is 0.009.

Step-by-step explanation:

According to the Central limit theorem, if from an unknown population large samples of sizes n > 30, are selected and the sample proportion for each sample is computed then the sampling distribution of sample proportion follows a Normal distribution.

The mean of this sampling distribution of sample proportion is:

$\mu_{\hat p}=p$

The standard deviation of this sampling distribution of sample proportion is:

$\sigma_{\hat p}=\sqrt{\frac{p(1-p)}{n}}$

As the sample size is large, i.e. n = 492 > 30, the central limit theorem can be used to approximate the sampling distribution of sample proportion by the normal distribution.

The mean and standard deviation of the sampling distribution of sample proportion are:

$\mu_{\hat p}=p=0.07\\\\\sigma_{\hat p}=\sqrt{\frac{p(1-p)}{n}}=\sqrt{\frac{0.07(1-0.07)}{492}}=0.012$

Compute the probability that the sample proportion will differ from the population proportion by greater than 0.03 as follows:

$P(|\hat p-p|>0.03)=P(|\frac{\hat p-p}{\sigma_{\hat p}}|>\frac{0.03}{0.012})$

$=P(|Z|>2.61)\\\\=1-P(|Z|\leq 2.61)\\\\=1-P(-2.61\leq Z\leq 2.61)\\\\=1-[P(Z\leq 2.61)-P(Z\leq -2.61)]\\\\=1-0.9955+0.0045\\\\=0.0090$

Thus, the probability that the sample proportion will differ from the population proportion by greater than 0.03 is 0.009.

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3 years ago

7) 57% of 56 is what? A) 31.9 B) 98.2 C) 3192 D) 2544

Aliun [14]

Answer:

57% of 56 is 31.92 (31.9) (A)

8 0

2 years ago

Write in descending order. 360t + 10t3 - 120t2

erastovalidia [21]

Answer:

30t - 120t² + 10t³

Step-by-step explanation:

30t + 10t³ - 120t²

In order of degrees of function, t³ > t² > t

So in terms of order of decreasing order, we have to rearrange the equation to

30t - 120t² + 10t³ likewise in terms if increasing degree of function,

10t³ - 120t² + 30t

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3 years ago

Factorise 21x-14y Pls try answer its for my homework thx

prohojiy [21]

$21x-14y \\ \\ GCF = 7 \\ \\ 7( \frac{21x}{7} + \frac{-14y}{7} ) \ / \ factor \ out \ gcf \\ \\ 7(3x - 2y) \ / \ simplify \\ \\ Answer: \fbox {7 (3x - 2y)}$

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3 years ago