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muminat
3 years ago
6

PLEASE JUST HELP ME LOOOL EXPLAIN WHY YOU GOT THE ANSWERS YOU DID PLEASE?

Mathematics
2 answers:
Ahat [919]3 years ago
3 0

9514 1404 393

Answer:

  A, C

Step-by-step explanation:

You know that the product (-1)×(-1) = 1. This is true for any number of minus signs. The end result is that a product or quotient is ...

  • negative for an odd number of minus signs
  • positive for an even number of minus signs

This means expressions with an odd number of minus signs will not be equivalent to the given value.

Equivalent values are ...

  -(1/(-8))

  (-1)/(-8)

lyudmila [28]3 years ago
3 0
A, and C is the answer
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Step-by-step explanation:

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4 years ago
A company has a new process for manufacturing large artificial sapphires. In a trial run, 37 sapphires are produced. The mean we
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Answer:

The margin of error is of 0.11 carats.

The 95% confidence interval for the true mean weight of all sapphires produced by the new process is between 6.64 and 6.86 carats. The interpretation is that we are 95% sure that the true weight of all sapphires produced by the company using the new process is between these two values.

Step-by-step explanation:

We have the standard deviation for the sample, which means that we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

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95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 36 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.05}{2} = 0.975. So we have T = 2.0281

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.0281\frac{0.33}{\sqrt{37}} = 0.11

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The lower end of the interval is the sample mean subtracted by M. So it is 6.75 - 0.11 = 6.64 carats

The upper end of the interval is the sample mean added to M. So it is 6.75 + 0.11 = 6.86 carats.

The 95% confidence interval for the true mean weight of all sapphires produced by the new process is between 6.64 and 6.86 carats. The interpretation is that we are 95% sure that the true weight of all sapphires produced by the company using the new process is between these two values.

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3 years ago
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4 years ago
The number of blocks has 9 in the ones place. The numberin the hundreds place i is one more that the numberin the tens place. Th
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Step-by-step explanation:

The number of blocks has 9 in the ones place.

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