3 years ago

What is the area of this?

1 answer:

6 0

The area is 13.

I think you were on the right track there. The area of the one on the bottom is 4*1, or 4. The area of the top upright rectangle is 9*1, or 9. 9+4=13.

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lbvjy [14]

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3 years ago

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VMariaS [17]

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Step-by-step explanation:

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$E(x) = \displaystyle\sum x_iP(x_i)\\E(x) = 1000(0.6) + 1200(0.3) + 1500(0.1)\\E(x) = 1110\\E(x^2) = \displaystyle\sum x_i^2P(x_i)\\E(x^2) = (1000)^2(0.6) + (1200)^2(0.3) + (1500)^2(0.1)\\E(x^2) = 1257000$

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Thus, the standard deviation is 157.7973

7 0

3 years ago