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stira [4]
3 years ago
11

PLEASE HELP ME WITH THIS PROBLEMS 2.

Mathematics
1 answer:
likoan [24]3 years ago
6 0

Answer: y = 8ˣ

<u>Step-by-step explanation:</u>

y = bˣ  substitute the coordinate (1, 8) for x and y and solve for b:

8 = b¹  ⇒ 8 = b

**********************************************************************************

Answer: P = 10e^{.22t}, 1964

<u>Step-by-step explanation:</u>

P = P_{0}e^{kt}

   = 10e^{.22t}

   = 10e^{.22(24)}

   = 1964

********************************************************************************

Answer: 10,147.47 ; 29,881.05

<u>Step-by-step explanation:</u>

A = Pe^{rt}

   = 9000e^{.06(2)}

   = 10,147.47

A = Pe^{rt}

   = 9000e^{.06(20)}

   = 29,881.05





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What is the value of the correlation coefficient r of the data set?
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The correct option will be:  C) 0.84

<u><em>Explanation</em></u>

Formula for Correlation coefficient :

r= \frac{n(\Sigma xy)-(\Sigma x)(\Sigma y)}{\sqrt{[n\Sigma x^2-(\Sigma x)^2][n\Sigma y^2-(\Sigma y)^2]}}

First, for each point(x, y), we need to calculate x², y² and xy .

Then, we will find sum all x, y, x², y² and xy, which gives us Σx, Σy, Σx², ∑y² and Σxy

<em>(Please refer to the attached image for the table )</em>

Here we got, ∑x = 44 , ∑y = 183 , ∑x² = 362 , ∑y² = 6575 and ∑xy = 1480

'n' is the total number of data set, which is 7 here.

So, plugging those values into the above formula..........

r= \frac{n(\Sigma xy)-(\Sigma x)(\Sigma y)}{\sqrt{[n\Sigma x^2-(\Sigma x)^2][n\Sigma y^2-(\Sigma y)^2]}}\\ \\ r=\frac{7(1480)-(44)(183)}{\sqrt{[7(362)-(44)^2][7(6575)-(183)^2]}}\\ \\ r=\frac{10360-8052}{\sqrt{(598)(12536)}}\\ \\ r=\frac{2308}{\sqrt{7496528}}\\ \\ r=0.84

So, the value of the correlation coefficient is 0.84

4 0
3 years ago
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Can someone please help?? what’s the measure of the vertex angle
maw [93]

Answer:

120 deg

Step-by-step explanation:

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7 0
2 years ago
49 percent of all people who buy running shoes don't run at all Assuming 340,000 people but running shoes how many will use them
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At thw movies,Aaron buys popcorn for $5.25 and a bottle of water for $2.50. He pays with a $10 dollar bill. How much change shou
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Answer:

5.25 + 2.50 = 7.75. 10 - 7.75 =2.25

Step-by-step explanation:


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3 years ago
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True or false : <br> 20÷4x5= 1<br> 10+10÷2=15<br> 6+4×5=50<br> 12_3×2=6<br> 81÷9+2=11
ELEN [110]
To solve, you must use order of operations. The acronym used is BEDMAS (brackets, exponents, division/multiplication, addition/subtraction), which is the order you solve in. 

F  20÷4x5
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T   10+10÷2
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<span>T   81÷9+2
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