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Fynjy0 [20]
2 years ago
10

How much would you pay for 2.5 ounces of gold at the price of $1200 per ounce

Mathematics
2 answers:
Fudgin [204]2 years ago
8 0

Answer:

you would pay $6.79 dollers per ouncen

Step-by-step explanation:

Anastaziya [24]2 years ago
4 0
2.5 • 1200 =$3000

Since each ounce is $1200, you would multiply the amount (2.5) with $1200 to get the total cost.

The answer is $3000.
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Someone please help!! find the value of y in this triangle
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Step-by-step explanation:

Triangle containing 120° and y° is an isosceles triangle.

Therefore,

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2y° = 180° - 120°

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What is the radius of the circle with equation<br> x2 + y2 – 8x + 12y – 5 = 0?
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radius: \sqrt{52}

Step-by-step explanation:

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3 years ago
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3 years ago
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5
masya89 [10]

Answer:

z= \frac{3.44-2.54}{0.45}=2

P(X>3.44) = P(Z>2) = 0.025

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the grade points avergae of a population, and for this case we know the following properties

Where \mu=2.54 and \sigma=0.45

The empirical rule, also referred to as the three-sigma rule or 68-95-99.7 rule, is a statistical rule which states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ). Broken down, the empirical rule shows that 68% falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ).

So we can find the z score for the value of X=3.44 in order to see how many deviations above or belowe we are from the mean like this:

z= \frac{3.44-2.54}{0.45}=2

So the value of 3.44 is 2 deviations above from the mean, so then we know that the percentage between two deviations from the mean is 95% and on each tail we need to have (100-95)/2 = 2.5% , because the distribution is symmetrical, so based on this we can conclude that:

P(X>3.44) = P(Z>2) = 0.025

5 0
3 years ago
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