2 years ago

Which of the following is NOT an example of a contract?

1 answer:

8 0

Answer: “borrowing lunch money”

Explanation: The other options involve paperwork, whereas borrowing lunch money is more casual. Paperwork is not needed for borrowing lunch money.

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Sams bill at a restaurant is $12, and he leaves a 20% tip. What is the total bill including the tip

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2 years ago

A professor records the difference between the marks scored by the students in the class test last week and those scored in the

dezoksy [38]

Answer: $(10.82\ , 13.18)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\mu\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 35 , large sample (n>30)

Mean difference : $\overline{x}=12$

Standard deviation : $\sigma=3$

Significance level : $\alpha=- 1-0.999=0.001$

Critical value : $z_{\alpha/2}=z_{0.0005}=3.4807567$

Now, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students will be :-

$12\pm\ (3.4807567)\dfrac{2}{\sqrt{35}}\\\\=12\pm1.18\\\\=(10.82\ , 13.18)$

Hence, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students = $(10.82\ , 13.18)$

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2 years ago

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madreJ [45]

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2 years ago

349 times 3 expanded form

Mkey [24]

Answer:

Step-by-step explanation:

300(3) + 40(3)+ 9(3)

600+120+27

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2 years ago

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Which is the greatest common factor of 18 and 54?

AysviL [449]

Answer:

Step-by-step explanation:

18 can be divided by 18 =1

54 divided by 18 = 3

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2 years ago

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