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natta225 [31]
3 years ago
8

WILL MARK THE BRAINIEST!!! LOTS OF POINTS!! HELP NOW

Mathematics
1 answer:
nadya68 [22]3 years ago
7 0
The answer is a) cos(arctan(1)) and the Angle is in quadrant 111
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Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5
iris [78.8K]

Answer:

By the Empirical Rule, 99.7% of the students have grade point averages that are between 1.28 and 3.8.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed(bell-shaped) random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 2.54

Standard deviation = 0.42.

Between 1.28 and 3.8?

1.28 = 2.54 - 3*0.42

So 1.28 is 3 standard deviations below the mean

3.8 = 2.54 + 3*0.42

So 3.8 is 3 standard deviations above the mean

By the Empirical Rule, 99.7% of the students have grade point averages that are between 1.28 and 3.8.

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3 years ago
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the length of a rectangle is 2 cm less than 7 times the width.the perimeter is 60 cm. find the width and length
Mnenie [13.5K]
Width = 4
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Given that €1 = £0.72<br> A) How much is €410 in £?<br><br> B) What is the £ to € exchange rate?
Natalka [10]

Answer:

€295.2

Step-by-step explanation:

410x0.72 = 295.2

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Given the triangle below what is the length of the third side rounded to the nearest whole number?
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Not completely sure but i think it is 16
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15(3y+1)

Step-by-step explanation:

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