2 years ago

Item 3

Mathematics

2 answers:

serg [7]2 years ago

7 0

1 hour , 1 minute, 1 second

soldi70 [24.7K]2 years ago

4 0

1 Hour is longest then 1 minute then 1 second is shortest

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Help me please!!!!!!!!

kompoz [17]

Answer:

The answer is A

Mean: 2

Median: 1

Step-by-step explanation:

3 0

2 years ago

(5+w)(w+4) in standard form

dlinn [17]

Answer:

w² +9w +20

Step-by-step explanation:

Multiply it out, collect terms, and write as descending powers of w.

(5+w)(w+4) = 5w +5·4 +w² +w·4

= w² +9w +20

7 0

2 years ago

Can someone double check me???

kvv77 [185]

You’re correct I think

8 0

2 years ago

A fire department in a rural county reports that its response time to fires is approximatelyNormally distributed with a mean of

____ [38]

Answer:

Option C) 0.25

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 22 minutes

Standard Deviation, σ = 11.9 minutes

We are given that the distribution of response time is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(response times is over 30 minutes)

P(x > 30)

$P( x > 30) = P( z > \displaystyle\frac{30 - 22}{11.9}) = P(z > 0.6722)$

$= 1 - P(z \leq 0.6722)$

Calculation the value from standard normal z table, we have,

$P(x > 30) = 1 - 0.749= 0.251 = 25.1\%$

Thus, the correct answer is

Option C) 0.25

3 0

2 years ago

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Arturiano [62]

1246678956)7t fhiuxdc

4 0

3 years ago

Read 2 more answers