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Ludmilka [50]
3 years ago
12

A sweater originally costs $36. If the sweater is on sale for $30.24 what is the percent of the discount

Mathematics
2 answers:
avanturin [10]3 years ago
6 0
36 - 30.24 = 5.76

36 x 0.16 = 5.76

The answer is 16%

I hope this helps! 

skelet666 [1.2K]3 years ago
5 0
I think not sure but i think the discout is $5.76
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5 hours after she starts or 4 hours after you start.

Step-by-step explanation:

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Suppose that X is a random variable with mean 30 and standard deviation 4. Also suppose that Y is a random variable with mean 50
Vladimir79 [104]

Answer:

a) Var[z] = 1600

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b) Var[z] = 2304

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c) Var[z] = 80

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d) Var[z] = 80

    D[z] = 8.94

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Step-by-step explanation:

In general

V([x+y] = V[x] + V[y] +2Cov[xy]

how in this problem Cov[XY] = 0, then

V[x+y] = V[x] + V[y]

Also we must use this properti of the variance  

V[ax+b] = a^{2}V[x]

and remember that

standard desviation = \sqrt{Var[x]}

a) z = 35-10x

   Var[z] = 10^{2} Var[x] = 100*16 = 1600

   D[z] = \sqrt{1600} = 40

b) z = 12x -5

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   D[z] = \sqrt{2304} = 48

c) z = x + y

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   D[z] = \sqrt{80} = 8.94  

d) z = x - y

   Var[z] =  Var[x-y] = Var[x] + Var[y] = 16 + 64 = 80

   D[z] = \sqrt{80} = 8.94

e) z = -2x + 2y

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  D[z] = \sqrt{320} = 17.88

   

7 0
3 years ago
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