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True [87]
2 years ago
8

I need help with this​

Mathematics
1 answer:
REY [17]2 years ago
4 0

Answer:

Left space down:         Right space down:

1                                     3

3                                    9

5                                    15

25                                 75

30                                 90

35                                 105

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An article suggested that yield strength (ksi) for A36 grade steel is normally distributed with μ = 44 and σ = 5.0. (a) What is
aalyn [17]

Answer:

Step-by-step explanation:

Using normal distribution,

z = (x - μ)/σ

μ= mean = 44 and

σ = standard deviation= 5.0

a) The probability that yield strength is at most 40=

P( x lesser than or equal to 40)

z = (40-44)/5= -0.8

Looking at the normal distribution table,

P( x lesser than or equal to 40) =0.2119

b) P(x greater than 62) = 1 - P(x lesser than or equal to 62)

z = (62-44)/5= 3.6

Looking at the normal distribution table,

P(x greater than 62) = 1 -0.99984

= 0.00016

c)P( 42 lesser than or equal to x lesser than or equal to 62)

= P(x lesser than or equal to 62) - P( x lesser than or equal to 40)

= 0.99987-0.2119= 0.78797

d) What yield strength value separates the strongest 75% from the others.

To get x for strongest 75, we get the z value corresponding to 0.75 from the table

z = 0.675= (x-44)/5

x = 3.375+44 = 47.375

The rest is 25% = 0.25

we get the z value corresponding to 0.25 from the table)

z = -0.67 = (x-44)/5

-3.35= x -44

x = -44+3.35= 40.65

yield strength value that separates the strongest 75% from the others

=47.375-40.65= 6.725

3 0
3 years ago
The population of New York City is 23,945. Eastdale has a population of 12,774 What is the total population of the two communiti
serious [3.7K]
No.d
37,619

I hope that this helps you and please mark me as the brainliest.
3 0
2 years ago
All of the following are equivalent except _____.
lianna [129]

Answer:

-5(x - 1)

Step-by-step explanation:

you would get -5x - 5 if you solved it

8 0
3 years ago
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      x+82+y
______________  =87
         3
y-x=17
87,98, and 82.
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Juan’s purchase before sales tax was added totaled $46.00. the total including tax was $48.76. what was the sales tax rate?
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The sales tax rate is 6%.
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