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rjkz [21]
3 years ago
10

Please please help me omg I give 28 points

Mathematics
2 answers:
rodikova [14]3 years ago
5 0

Answer:

<h2>Correct cost for the cell phone monthly plan =54.2$</h2>

Explanation:

Price for monthly plan = 58.95$

Discount = 4.75 $

New cost found out by Sam = 11.45$

Discount considered by Sam = 58.95 - 11.45 = 47.5$

So, Instead of considering discount amount of 4.75$ Sam accidentally considered 47.5$, so he got 11.45$ as new cost for the cell phone plan.

Actual cost = 58.95 - 4.75 = 54.2$ %3!

Correct cost for the cell phone monthly plan 54.2$

Semmy [17]3 years ago
4 0
No because all you have to do is subtract the discount and monthly plan. You get another number that is more.

Canvas is wack
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Historically, these bolts have an average thickness of 10.1 mm. A recent random sample of 10 bolts yielded these thicknesses: (D
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So, the sample mean is 9.99.

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Step-by-step explanation:

From Exercise we have the next numbers:  9.7 9.9 10.3 10.1 10.5 9.4 9.9 10.1 9.7 10.3.

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\overline{x}=\frac{9.7+ 9.9+ 10.3+ 10.1+ 10.5+ 9.4+ 9.9+ 10.1+ 9.7+ 10.3}{10}\\\\\overline{x}=\frac{99.9}{10}\\\\\overline{x}=9.99

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We use the formula for standard deviation:

\sigma=\sqrt{\frac{1}{N}\sum_{i=1}^N(x_i-\overline{x})^2}

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Therefore, we get

\sigma=\sqrt{\frac{1}{N}\sum_{i=1}^N(x_i-\overline{x})^2}\\\\\sigma=\sqrt{\frac{1}{10}\cdot 1.009}\\\\\sigma=0.32

So, the  standard deviation is 0.32.

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4 years ago
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