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AURORKA [14]
3 years ago
9

How do i do time and distance

Mathematics
1 answer:
larisa [96]3 years ago
8 0

Answer:

To solve for speed or rate use the formula for speed, s = d/t which means speed equals distance divided by time. To solve for time use the formula for time, t = d/s which means time equals distance divided by speed.

Step-by-step explanation:

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A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 444 gram setting. It is
ankoles [38]

Answer:

The null hypothesis is H_0: \mu = 444

The alternative hypothesis is H_1: \mu < 444

The p-value of the test is 0.1148 > 0.05, which means that the sample does not give enough evidence to conclude that the machine is underfilling the bags.

Step-by-step explanation:

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 444 gram setting.

At the null hypothesis, we test if the machine works correctly, that is, the mean is of 444. So

H_0: \mu = 444

At the alternative hypothesis, we test if they are underfilling, that is, if the mean is of less than 444. So

H_1: \mu < 444

The test statistic is:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, s is the standard deviation and n is the size of the sample.

444 is tested at the null hypothesis:

This means that \mu = 444

A 41 bag sample had a mean of 440 grams with a variance of 441.

This means that n = 41, X = 440, s = \sqrt{441} = 21

Value of the test statistic:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{440 - 444}{\frac{21}{\sqrt{41}}}

t = -1.22

P-value of the test:

Right-tailed test(test if the mean is less than a value), with 41 - 1 = 40 df and t = -1.22.

Using a t-distribution calculator, this p-value is of 0.1148

The p-value of the test is 0.1148 > 0.05, which means that the sample does not give enough evidence to conclude that the machine is underfilling the bags.

6 0
2 years ago
Are these expressions equivalent?(-2.6) + (-2.9) + (-7.1) and – (2.6+2.9+7.1) Why or why not?
Vilka [71]

Answer:

Yes

Step-by-step expiation:

Negative plus negative equals a positive but you add the negative to a positive the number becomes a negative. and the other side everything is

positive in parentheses followed by a negative so they are equal.

7 0
3 years ago
Read 2 more answers
Describe a way you can use graham crackers to demonstrate the division problem 3 divided by 1/4 . Include the result in your des
lesantik [10]
You can take 3 graham crackers. Break each into 4 pieces. Then, you will have 12 pieces. So 3 divided by 1/4 = 12. Hope it helps! :)
5 0
3 years ago
The factory used to produce 126 articles a day. As a result of retooling, production increased to 189 articles a day. What was t
NARA [144]

Answer: The answer is 50%.


Step-by-step explanation:  Given that the factory produces 126 articles in a day. After retooling, the production of the articles increased and they started producing 189 articles in a day. We need to calculate the percent increase in labour productivity.

We have,

Percent Increase in labour productivity will be equal to the percent increase in the number of articles.

Increase in the number of articles after retooling = 189 - 126 = 63.

Therefore, percent increase in the number of articles is given by

p=\dfrac{63}{126}\times 100\%=\dfrac{100}{2}\%=50\%.

Thus, the labour productivity increased by 50%.

8 0
3 years ago
A withdrawal of 225 what is the integer
mixer [17]

Answer:

-225

Step-by-step explanation:

A withdraw means taking out -225  dollars

8 0
3 years ago
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