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Ipatiy [6.2K]
3 years ago
15

It costs $16 for 8 specialty chocolates for Valentines Day. Find the unit rate 5 per item (how much for 1 chocolate).​

Mathematics
1 answer:
Rasek [7]3 years ago
8 0

Answer:

Unit Rate: 2$ per chocolate

If you're buying 5, it will cost $10

Step-by-step explanation:

Finding the unit rate:

16 ÷ 8 = 2

2 x 5 = $10

If you're talking about what happens if each chocolate cost $5 per item it would be

$5 x 8 chocolates = $40

I hope this helped! :)

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You are trying to estimate the average amount a family spends on food during a year. In the past the standard deviation of the a
PolarNik [594]

The number of the families that need to be surveyed will be 2663.

<h3>What is the margin of error?</h3>

Your results will deviate from the actual population value by how many percentage points, as indicated by the margin of error.

We have the following info:

ME = 50 margins of error desired

\sigma = 1000 the standard deviation for this case

The margin of error is given by this formula:

(a) ME=Z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

And on this case, we have that ME =50 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

(b) n =(\dfrac{Z_{a\2}\sigma}{ME})^2

The critical value for the 99% of confidence interval now can be founded using the normal distribution. The significance is \alpha = 0.01. And for this case would be Z_{\alpha / 2} = 2.58, replacing into formula (b) we got:

n=(\dfrac{2.58(1000)}{50})^2= 2663

So the answer for this case would be n=2663 rounded up to the nearest integer.

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https://brainly.ph/question/537052

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8 0
2 years ago
he exponential model Upper A equals 347.5 e Superscript 0.024 t describes the​ population, A, of a country in​ millions, t years
yulyashka [42]

Answer:

The population of the country will be 510 million during the year of 2018.

Step-by-step explanation:

The exponential model for the population, in millions, t years after 2003 is.

P(t) = 347.5e^{0.024t}

Use the model to determine when the population of the country will be 510 million.

t years after 2003, in which t is found when P(t) = 510. So

P(t) = 347.5e^{0.024t}

510 = 347.5e^{0.024t}

e^{0.025t} = \frac{510}{347.5}

Applying ln to both sides, so we can find t

\ln{e^{0.025t}} = \ln{\frac{510}{347.5}}

t = \frac{\ln{\frac{510}{347.5}}}{0.025}

t = 15.35

15.35 years after 2003, so during the year of 2018.

The population of the country will be 510 million during the year of 2018.

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4 years ago
What doesn't the law of cosines reduce to when dealing with a right triangle
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Yoooooooooooooooooooooooooo can you please help me!?
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She has totally 10+5+3=18 marbles, so the probability is 10/18=5/9. The complement is (9-5)/9=4/9.

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