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Nataly_w [17]
2 years ago
10

A construction crew has just finished building a road. The crew worked for 4 4/9 days. If they built 2 1/5 kilometers of road ea

ch day, what is the total length of road they built?
Mathematics
1 answer:
Bingel [31]2 years ago
5 0
I think it would be 965.35 kilometers of road after 44/9 day
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The length of time a full length movie runs from opening to credits is normally distributed with a mean of 1.9 hours and standar
Margarita [4]

Answer:

  1. 0.26
  2. 0.91
  3. 1.43

Step-by-step explanation:

given data

mean = 1.9 hours

standard deviation = 0.3 hours

solution

we get here first  random movie between 1.8 and 2.0 hours

so here

P(1.8 < z < 2 )

z = (1.8 - 1.9) ÷ 0.3

z = -0.33

and

z = (2.0 - 1.9) ÷ 0.3

z = 0.33

z = 0.6293

so

P(-0.333 < z < 0.333 )

=  0.26

so random movie is between 1.8 and 2.0 hours long is 0.26

and

A movie is longer than 2.3 hours.

P(x > 2.3)

P( \frac{x-\mu }{\sigma}  > \frac{2.3-\mu }{\sigma} )

P (z  > \frac{2.3-1.9 }{0.3}  )

P (z  > 1.333  )

= 0.091

so chance a movie is longer than 2.3 hours is 0.091

and

length of movie that is shorter than 94% of the movies is

P(x > a ) = 0.94

P(x <  a ) = 0.06

so

P( \frac{x-\mu }{\sigma } <  \frac{a-\mu }{\sigma } )

\frac{a-1.9 }{0.3 } = -1.55

a = 1.43

so length of the movie that is shorter than 94% of the movies about 1.4 hours.

3 0
3 years ago
Find the length of the line segment that connects the points (7, 16) and (47, 140)​
tresset_1 [31]

Answer:

length =  \sqrt{ {(47 - 7)}^{2}  +  {(140 - 16)}^{2} }  \\  =  \sqrt{ {40}^{2}  +  {124}^{2} }  \\  =  \sqrt{16976}  \\  = 130.29 \: units

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astraxan [27]

Hello I hope you are having a Great day :)

Your question, 296.32 divided by 4

Your answer would be 74.08

Hopefully that helps you :)

7 0
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In need help plz.....………
abruzzese [7]

Here you go, enjoy.

1. 8,8

2. 5,4

3. 4,4

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Step-by-step explanation:

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