2 years ago

The price of a calculator decreased from $20 to $18. What is the percent of decrease? *

Mathematics

1 answer:

anastassius [24]2 years ago

4 0

Answer:

the parcentage is 111.11

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A box has demensions of 17in long 1.3 ft wide and 8in high what is the volume of the Box? The formula for the volume is v=1 w•h.

KIM [24]

Using the formula V = L x W x H, multiply the 3 dimensions together.

17 x 1.3 x 8 = 176.8 cubic inches.

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3 years ago

James had $ 6500 in a bank account that paid 4% interest at the end of each year. How much money did Mr. James have in his accou

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He would have $6,760 in his account after year one.
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What is negative 5 5/6–2 3/5

dangina [55]

Answer:

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Step-by-step explanation:

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3 years ago

I need help with this

Harrizon [31]

$105 \div 8.7$

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The number of violent crimes committed in a day possesses a distribution with a mean of 2.2 crimes per day and a standard deviat

VARVARA [1.3K]

Answer:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And replacing we got:

$\mu_{\bar X}= 2.2$

$\sigma_{\bar X}= \frac{6}{\sqrt{100}}= 0.6$

Step-by-step explanation:

For this case we have the following info given:

$\mu = 2.2$ represent the mean

$\sigma = 6$ represent the deviation

We select a sample size of n=100. This sample is >30 so then we can use the central limit theorem. And we want to find the distribution for the sample mean and we know that the distribution is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And replacing we got:

$\mu_{\bar X}= 2.2$

$\sigma_{\bar X}= \frac{6}{\sqrt{100}}= 0.6$

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3 years ago