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Anettt [7]
3 years ago
10

I seriously am stuck please help me

Mathematics
2 answers:
inysia [295]3 years ago
8 0

Answer: the distance is 9.4339

Step-by-step explanation:

You have to apply the formula of the distance between two coordinate points

\sqrt[(X2-X1)^{2} + (Y2-Y1)^{2}]

First you have to label X1, X2 and Y1,Y2

Our coordinate points are:

P= (-4. -2)    and  Q = (4, 3) Now we label them to apply the formula

P= (X1, Y1)    and  Q= (X2, Y2)

\sqrt[(X2-X1)^{2} + (Y2-Y1)^{2}], replacing

\sqrt[(4-(-4))^{2} + (3-(-2))^{2}]

\sqrt[(4+4)^{2} + (3+2)^{2}]

\sqrt[(8)^{2} + (5^{2}]  

\sqrt[64+ 25]  

\sqrt[89]

9.4339

Blababa [14]3 years ago
7 0

\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ P(\stackrel{x_1}{-4}~,~\stackrel{y_1}{-2})\qquad Q(\stackrel{x_2}{4}~,~\stackrel{y_2}{3})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ PQ=\sqrt{[4-(-4)]^2+[3-(-2)]^2}\implies PQ=\sqrt{(4+4)^2+(3+2)^2} \\\\\\ PQ = \sqrt{8^2+5^2}\implies PQ=\sqrt{64+25}\implies PQ=\sqrt{89}\implies \stackrel{\textit{rounded up}}{PQ = 9.4}

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Step-by-step explanation:

a. -A normal distribution is expressed in the form X~N(mean, standard deviation).

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-X is a is a normally distributed random variable with mean 2885 and standard deviation 651.

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P(X>x)=P(z>\frac{\bar X-\mu}{\sigma})\\\\=P(Z>\frac{5000-2885}{651})\\\\=P(z>3.2488)\\\\=1-0.99942\\\\=0.00058

Hence, the proportion of customers consuming over  5000 calories is 0.00058

d. The least amount of calories to get the award is calculated as:

1% is equivalent to a z value of 0.50399.

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0.01=P(z>\frac{\bar X-\mu}{\sigma})\\\\=P(z>\frac{\bar X-2885}{651})\\\\\1\%=0.50399 \\\\\frac{\bar X-2885}{651}=0.50399 \\\\\bar X=0.50399\times 651+2885\\\\=3213.09

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8 0
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