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xxTIMURxx [149]
2 years ago
8

What is $110 divided in the ratio 7:4?

Mathematics
2 answers:
dangina [55]2 years ago
5 0

Answer:

$62.86

Step-by-step explanation:

110 / 7 = 15.7142857143.

15.7142857143 * 4 = 62.8571428571.

That would mean the answer is $62.86.

<h2><u><em>PLEASE MARK AS BRAINLIEST!!!!!</em></u></h2>
Fynjy0 [20]2 years ago
3 0

Answer:

$70 and $40

Step-by-step explanation:

7 + 4 = 11

$110/11=$10

$10 * 7= $70

$10 * 4= $40

Hope this helped! :)

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Romashka-Z-Leto [24]

Answer:

4

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What is 1/6b=7.4 please help me
professor190 [17]


7.4/1/6=44.4

b=44.4

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3 years ago
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2. A marketing firm is trying to estimate the proportion of potential car buyers that would consider
Maurinko [17]

Answer:

a. The number of people that should be in the pilot study are 600 people

b. The point estimate is 0.62\overline 6

c. At 95% confidence level the true population proportion of potential car buyers of hybrid vehicle is between the confidence interval (0.588, 0.6654)

d. Two ways to reduce the margin of error are;

1) Reduce the confidence interval

2) Use a larger sample size

Step-by-step explanation:

a. The given parameters for the estimation of sample size is given as follows;

The margin of error for the confidence interval, E = 4% = 0.04

The confidence level = 95%

The sample size formula for a proportion as obtained from an online source is given as follows;

n = \dfrac{Z^2 \times P \times (1 - P)}{E^2}

Where, P is the estimated proportions of the desired statistic, therefore, we have for a new study, P = 0.5;

Z = The level of confidence at 95% = 1.96

n + The sample size

Therefore, we have;

n = \dfrac{1.96^2 \times 0.5 \times (1 - 0.5)}{0.04^2} = 600.25

Therefore, the number of people that should be in the pilot study in order to meet this goal at 95% confidence level is n = 600 people

b. The point estimate for the population proportion is the sample proportion  given as follows;

\hat p = \dfrac{x}{n}

Where;

x = The number of the statistic in the sample

n = The sample size

From the question, we have;

The number of potential car buyers, n = 600

The number of respondent in the sample that indicated that they would consider purchasing a hybrid, x = 376

Therefore, the point estimate, for the proportion of potential car buyers that would consider buying a hybrid vehicle, \hat p = 376/600 = 0.62\overline 6

c. The confidence interval for a proportion is given as follows

CI=\hat{p}\pm z\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

Therefore, we get;

CI=0.62 \overline 6\pm 1.96\times \sqrt{\dfrac{\hat{0.62 \overline 6}\cdot (1-\hat{0.62 \overline 6})}{600}}

C.I. ≈ 0.6267 ± 0.0387

The 95% confidence interval for the true population proportion of potential buyers of hybrid vehicle, C.I. =  (0.588, 0.6654)

d. The margin of error is given by the following formula;

MOE_\gamma = z_\gamma  \times \sqrt{\dfrac{\sigma ^2}{n} }

Where;

MOE_\gamma = Margin of error at a given level of confidence

z_\gamma = z-score

σ = The standard deviation

n = The sample size

Therefore, the margin error can be reduced by the following two ways;

1) Reducing the confidence interval and therefore, the z-score

2) Increasing the sample size

6 0
2 years ago
-3 = -15 -2(0 - 1) - 30
il63 [147K]

Answer:

Is there's supposed to be x or somethin... well I got  -40

Step-by-step explanation:

-3=-15 - 0+ 2 - 30

-3=-15+2-30

-3=-45+2

-3=-43

+3   +3

___________-

0=-40

Hope this helps :D

5 0
3 years ago
Need help with a question ​
Elodia [21]

so....wts the question?

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