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andrey2020 [161]
3 years ago
5

Plz help me fastttt it surface area of a rectangular prism

Mathematics
1 answer:
horrorfan [7]3 years ago
4 0

Answer:

72.2 square meter

Step-by-step explanation:

(3.8)(3.8)= 14.44

(14.44)(5)=72.2

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In the complex number system, which of the following is equal to
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Answer:

C) 122+154i

Step-by-step explanation:

(14-2i)(7+12i)\\\\(14)(7)+(14)(12i)+(-2i)(7)+(-2i)(12i)\\\\98+168i-14i-24i^2\\\\98+154i-24(-1)\\\\98+154i+24\\\\122+154i

Therefore, C is correct. Recall that i^2=-1

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A lottery consists of one $2000 winner, three $500 winners, and ten $100 winners. a total of 1000 tickets are sold for $10 each.
Semenov [28]

Answer: -5.5

 

WOKINGS

Given that the lottery has the following number of winners:

One $2000 winner

Three $500 winners

Ten $100 winners

 

Also Given,

A total of 1000 tickets are sold

Each ticket costs $10

 

The expected winning for a person purchasing one ticket is the sum of the products of the gain/loss and their corresponding probability.

 

There is one $2000 winner

There are 1000 tickets

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= 1/1000

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There are three $500 winners

There are 1000 tickets

The probability of winning $500

= 3/1000

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= .01

 

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Therefore, the probability of losing $10 is 1

 

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= 2000(.001) + 500(.003) + 100(.01) – 10(1)

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The expected winning is -5.5. This implies that a person playing this lottery can expect to lose $5.50 for every one ticket that they purchase. 

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