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trapecia [35]
3 years ago
6

Please help im lost.

Mathematics
1 answer:
8_murik_8 [283]3 years ago
8 0

Answer:

2

Step-by-step explanation:

h(t) =  - 16 {t}^{2}  + 64 \\ \Leftrightarrow 0 =  - 16 {t}^{2}  + 64 \\ \Leftrightarrow  {t}^{2}  = 4\Leftrightarrow t =  \pm2\Leftrightarrow t = 2 \: (t  \geqslant 0)

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The following data pairs represent the average temperature x (in degrees Fahrenheit) and electricity
elena55 [62]

Answer:

<u>The correct answer is C. r = 0 because is most likely the closest to the correlation coefficient of the data.</u>

Step-by-step explanation:

Using Excel, we captured the data provided for the 12 different homes for calculating the correlation coefficient manually, this way:

n = 12

∑x = 904

∑y = 2,169

∑xy = 167,532

∑x² = 69,552

∑y² = 404,615

r =  [n *∑xy  - (∑x * ∑y)]/[√(n * ∑x² - (∑x)²) * (n * ∑y²  - (∑y)²)]

Replacing with the real values, we have:

r = [12 * 167,532  - (904 * 2,169)]/[√(12 * 69,552 - 904²) * (12 * 404,615  - 2,169²)]

r = [2'010,384  -1'960,776]/[√(834,624 - 817,216) * (4'855,380  - 4'704,561]

r = 49,608/√17,408 * 150,819

r = 49,608/ 51'239.215

r = 0.00097

<u>The correct answer is C. r = 0 because is most likely the closest to the correlation coefficient of the data.</u>

4 0
3 years ago
Read 2 more answers
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