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Artist 52 [7]
3 years ago
12

Mark bought a new video game priced at 49.99. A sales tax of 8% was added to his purchase. How much tax did Mark pay?

Mathematics
1 answer:
devlian [24]3 years ago
7 0

Answer:I'm not sure but I think it's 47.38

Step-by-step explanation:

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5+[30-(8-1)² ÷ 11-2²
Xelga [282]

Answer:

26.5454545455

Step-by-step explanation:

6 0
2 years ago
The distribution of SAT II Math scores is approximately normal with mean 660 and standard deviation 90. The probability that 100
gayaneshka [121]

Using the <em>normal distribution and the central limit theorem</em>, it is found that there is a 0.1335 = 13.35% probability that 100 randomly selected students will have a mean SAT II Math score greater than 670.

<h3>Normal Probability Distribution</h3>

In a normal distribution with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

  • It measures how many standard deviations the measure is from the mean.
  • After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.
  • By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation s = \frac{\sigma}{\sqrt{n}}.

In this problem:

  • The mean is of 660, hence \mu = 660.
  • The standard deviation is of 90, hence \sigma = 90.
  • A sample of 100 is taken, hence n = 100, s = \frac{90}{\sqrt{100}} = 9.

The probability that 100 randomly selected students will have a mean SAT II Math score greater than 670 is <u>1 subtracted by the p-value of Z when X = 670</u>, hence:

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{670 - 660}{9}

Z = 1.11

Z = 1.11 has a p-value of 0.8665.

1 - 0.8665 = 0.1335.

0.1335 = 13.35% probability that 100 randomly selected students will have a mean SAT II Math score greater than 670.

To learn more about the <em>normal distribution and the central limit theorem</em>, you can take a look at brainly.com/question/24663213

7 0
2 years ago
When you draw a circle and two of its diameters and connect the end points of the diameters what quadirateral do you get?
sergij07 [2.7K]
A vin diagram I'm pretty sure. or maybe drugs pflucked my brain up. js
3 0
3 years ago
How many cubic inches? Please help!?!
iragen [17]

1575 cubic inches

This is the answer to your question.

7 0
2 years ago
Which statement describes the transformation of the graph of function f onto the graph of function g?
Andru [333]
The last answer is correct
3 0
2 years ago
Read 2 more answers
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