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Allushta [10]
3 years ago
11

An athlete jumps vertically at t=0 from the ground and stays in the air for one second before landing on the ground again. The h

ighest point of her jump is at 4 feet. A quadratic function can be used to find the height h of the athlete's jump in terms of time t.
Which of the following graphs is the graph of this function?
Mathematics
1 answer:
lawyer [7]3 years ago
3 0

Answer:

The answer is B

Step-by-step explanation:

I just did the Quick Check, the attachment is the answer, np.

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The expansion of (x-2)(x+2) is …..​
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x2-4

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The results of a survey indicate 50% of seventh-graders watch at least one movie
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25 students

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Variation equation and determine the quantity indicated.
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8 0
3 years ago
Do bonds reduce the overall risk of an investment portfolio? Let x be a random variable representing annual percent return for t
rjkz [21]

Answer:

COV (all stocks) = 0.55

COV (stocks and bonds) = 0.82

Step-by-step explanation:

Coefficient of Variation is used to measure variability.

It is defined as the ration of standard deviation and the mean.

It can be used to compare variability of two population or two samples.

Formula:

\text{Coefficient of Variation} = \displaystyle\frac{\text{Standard Deviation}}{\text{Mean}}

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}

where x_i are data points, \bar{x} is the mean and n is the number of observations.

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

x: 14, 0, 39, 25, 32, 27, 28, 14, 14, 15

Mean = \frac{208}{10} = 20.8

Standard~Deviation = \sqrt{\frac{1169.6}{9} } = 11.39

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y = 6, 2, 29, 17, 26, 17, 17, 2, 3, 5

Mean = \frac{124}{10} = 12.4

Standard~Deviation = \sqrt{\frac{924.4}{9} } = 10.13

Coefficient~of~Variation = \frac{10.13}{12.4} = 0.82%

Since coefficient of variation of x is less compared to y, thus it could be said bonds does not reduce overall risk of an investment portfolio.

6 0
3 years ago
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