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Zielflug [23.3K]
3 years ago
7

Let X denote the lifetime of a machine component with an exponential distribution. The mean time for the component failure is 25

00 hours.
Required:
What is the probability that the lifetime exceeds the mean time by more than 1 standard deviations?
Mathematics
1 answer:
hammer [34]3 years ago
7 0

Answer:

15.8 % ???

at z = 1 p=.8413

I guess the question is asking 1-.8413 = 15.8 %

Step-by-step explanation:

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zheka24 [161]

Answer:

45x

Step-by-step explanation:

that is the answer!!! :)

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Polly bought a cracker for $7 and then bought a parrot for $2. By how much did Polly's account change after her transactions?
marysya [2.9K]

Answer:

Changes = -\$9

Step-by-step explanation:

Given

Cracker = \$7

Parrot = \$2

Required

Determine the changes in the account

First, we need to determine the total amount spent;

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Total = \$7 + \$2

Total = \$9

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7 0
3 years ago
Okay I know I suck at math and I really don't understand math that well so can you help me on this??? Thank you!
Alja [10]
W - width
l - length
p - perimeter

The perimeter is 72 cm (p=72).
The length is twice the width (l=2w).
The formula for perimeter is 2w+2l=P.

p=72 \\&#10;l=2w \\ \\&#10;2w+2l=p \\&#10;2w+2 \cdot 2w=72 \\&#10;2w+4w=72 \\&#10;6w=72 \\&#10;w=12 \\ \\&#10;l=2w=2 \cdot 12 =24

Check the answer:
2 \cdot 12 + 2 \cdot 24 \stackrel{?}{=} 72 \\&#10;24+48 \stackrel{?}{=} 72 \\&#10;72 \stackrel{?}{=} 72 \\ \hbox{true}

The length of the photo is 24 cm, the width of the photo is 12 cm.
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8 0
2 years ago
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