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Margaret [11]
2 years ago
8

Rima and Eric have earned a total of 135 tokens to buy items at the school store. The ratio of the number of tokens that Rima ha

s to the number of tokens that Eric has is 8:7. How many tokens does Rima have?
Mathematics
2 answers:
prisoha [69]2 years ago
8 0

Answer:

72

Step-by-step explanation:

raketka [301]2 years ago
3 0

Answer:

127

Sqep-by-step explanation:

135-8:7

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An important factor in selling a residential property is the number of times real estate agents show a home. A sample of 23 home
yanalaym [24]

Using the t-distribution, it is found that:

a. The <u>margin of error</u> is of 4.7 homes.

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The information given in the text is:

  • Sample mean of \overline{x} = 24.
  • Sample standard deviation of s = 9.
  • Sample size of n = 23.

We are given the <u>standard deviation for the sample</u>, which is why the t-distribution is used to solve this question.

The confidence interval is:

\overline{x} \pm M

The margin of error is:

M = t\frac{s}{\sqrt{n}}

Item a:

The critical value, using a t-distribution calculator, for a two-tailed <u>98% confidence interval</u>, with 23 - 1 = <u>22 df</u>, is t = 2.508.

Then, the <em>margin of error</em> is:

M = t\frac{s}{\sqrt{n}} = 2.508\frac{9}{\sqrt{23}} = 4.7

Item b:

The interval is:

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The 98% confidence interval for the population mean is (19.3, 28.7).

A similar problem is given at brainly.com/question/15180581

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2 years ago
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Setler79 [48]

Answer:

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the Pythagorean theorm is a^2+b^2=c^2 where a and b are the legs (in this case the side of the triangle) and c is the hypotenuse which is the longest side in a right triangle

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x^2=7225/16

now take the square root of both sides and you get -21.25 and 21.25

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Gnesinka [82]
She would have had to buy 8 key chains for three dollars a piece.
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