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3 years ago

7

I need help with a problem help pls

2 answers:

Viktor [21]3 years ago

6 0

There are 2 circular bases: A = π r²
A = π (3)²
   = 9 π

There is one lateral face that is a rectangle: A = L x W
In this instance, the length equals the perimeter of the circle: L = 2 π r
A = 2 π (3) x 7
   = 42 π

Surface Area = 2(9 π) + 42 π
                       = 18 π + 42 π
                       = 60 π
                       ≈ 188

Answer: D

Tcecarenko [31]3 years ago

4 0

2 π x 3 x 7 + π x 3^2 x2= 60 π= 188

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Answer:

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In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

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In which

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e = 2.71828 is the Euler number

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$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)$

In which

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So

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0.2103 = 21.03% probability that, in any seven-day week, the computer will crash less than 3 times.

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