All categories

3 years ago

Please answer this correctly

Mathematics

2 answers:

olasank [31]3 years ago

8 0

Answer:

12 days

Step-by-step explanation:

Daniel [21]3 years ago

5 0

Answer:

5 days

Step-by-step explanation:

Think...

10 ounces for every 8 dogs

Multiply 10 and 8 which equals to 80 ounces of food.

Now convert 25 pounds into ounces

25lbs = 400 oz

Now divide 400 by 80

Which equals 5

So the 25 pound bag of food will last 5 days

You might be interested in

Ryan found a pattern on the addition table . He shaded two diagonal lines that show his pattern. What is his pattern?

LenaWriter [7]

it would be adding by 2's because to get from 2 to 4 you have to add two or from 6 to 8 you have to add two also

6 0

4 years ago

How do you use the law of cosines or law of sines if you are given a=13 m, b=8.5 m, and c=9 m?

Rus_ich [418]

The law of cosines is
c= square root of a^2 + b^2 - 2ab cos c

the law of sines is
a = b(sin a /sin b)

3 0

3 years ago

It is recommended that people eat

ale4655 [162]

Answer:

First you have to convert MG to G, 1 Gram is equal to 1,000 Milligrams. If Julie has eaten a total of 9 Grams of fiber, she would need to eat 11 Grams more to get her recommended amount of Fiber

Step-by-step explanation:

1. Convert Mg to G

2. Add the amount of Grams she has already eaten.

3. Subtract the sum from twenty and multiply the difference by 1,000.

5 0

2 years ago

The stock of Company A gained 4% today to $4.16. What was the opening price of the stock in the beginning of the day?

Oksana_A [137]

Answer:

The opening price of the stock in the beginning of the day was $4.

Step-by-step explanation:

To be able to calculate the price of the stock at the beginning of the day, you have to consider that the equation to calculate the final price is equal to the opening price multiply for the result of one plus the increase or decrease percentage, which is:

final price=opening price*(1+0.04)

Now, you know that the final price is $4.16, so you can replace this value in the formula and solve for the opening price:

4.16=opening price*1.04

opening price=4.16/1.04

opening price=4

According to this, the answer is that the opening price of the stock in the beginning of the day was $4.

6 0

3 years ago

In a random sample of 25 people, the mean commute time to work was 33.9 minutes and the standard deviation was 7.2 minutes. Ass

Phoenix [80]

Answer:

$33.9-1.32\frac{7.2}{\sqrt{25}}=31.999$

$33.9+1.32\frac{7.2}{\sqrt{25}}=35.801$

So on this case the 80% confidence interval would be given by (31.999;35.801)

And the margin of error is given by:

$ME = t_{\alpha/2}\frac{s}{\sqrt{n}}$

And replacing we got:

$ME = 1.32\frac{7.2}{\sqrt{25}} =1.9008$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X=33.9$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s=7.2 represent the sample standard deviation

n=25 represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=25-1=24$

Since the Confidence is 0.80 or 80%, the value of $\alpha=0.2$ and $\alpha/2 =0.1$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.01,24)".And we see that $t_{\alpha/2}=1.32$

Now we have everything in order to replace into formula (1):

$33.9-1.32\frac{7.2}{\sqrt{25}}=31.999$

$33.9+1.32\frac{7.2}{\sqrt{25}}=35.801$

So on this case the 80% confidence interval would be given by (31.999;35.801)

And the margin of error is given by:

$ME = t_{\alpha/2}\frac{s}{\sqrt{n}}$

And replacing we got:

$ME = 1.32\frac{7.2}{\sqrt{25}} =1.9008$

7 0

4 years ago