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Marina CMI [18]

2 years ago

8

The US dollar can be exchanged for other types of currency in the world the exchange rate is always changing suppose one eruro i

s equivalent to two dollars
HELP DUE TODAY! PLS HELPP

1. 2. 5. 10. Euro

2. ? ? ? US dollars

1 answer:

puteri [66]2 years ago

5 0

Answer:

$2, $4, $10, $20

Step-by-step explanation:

1*2=2

2*2=4

5*2=10

10*2=20

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Andreyy89

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If CB =3(x+8) and AD= 4(x+3), find AB

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2 years ago

The temperature in some region of Alaska equals 15 F. Convert this temperature to Celsius.

sergij07 [2.7K]

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7 0

2 years ago

The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 year

puteri [66]

Answer:

$z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29$

Step-by-step explanation:

information given

$\bar X=10.6$ represent the sample mean

$\sigma=4.1$ represent the population standard deviation

$n=45$ sample size

$\mu_o =12$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

z would represent the statistic

$p_v$ represent the p value for the test

Hypothesis to test

We want to test if the true mean is less than 12, the system of hypothesis would be:

Null hypothesis: $\mu \geq 10$

Alternative hypothesis: $\mu < 10$

The statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

Replacing the info given we got:

We can replace in formula (1) the info given like this:

$z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29$

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3 years ago

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Answer:

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3 years ago