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3 years ago

I need help its urgent plz

Mathematics

1 answer:

Karolina [17]3 years ago

5 0

What kind of work is that ?

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Weekly wages at a certain factory are

Furkat [3]

Answer: 0.1359

Step-by-step explanation:

mean = $400

Standard deviation = $50

Since the wages is normally distributed , the first thing is to find the z - score.

z = $\frac{x-mean}{standard deviation}$

finding the z - value for 300 and 350 , we have

z = $\frac{300-400}{50}$

z = $\frac{-100}{50}$

2 = -2

also

z = $\frac{350-400}{50}$

z = $\frac{-50}{50}$

z = -1

The next thing is to check the calculated value on z - table.

From z - table :

P (z $\leq$ -2 ) = 0.0228

P ( z $\leq -1$ ) = 0.1587

combining the two

P ( -2 $\leq$ z $\leq$ -1 ) = 0.1587 - 0.0228

P ( -2 $\leq$ z $\leq$ -1 ) = 0.1359

Therefore , the the probability that a worker

selected at random makes between

$300 and $350 = 0.1359

3 0

3 years ago

HELP PLEASE find the value of x

Drupady [299]

Answer:

x = 1

Step-by-step explanation:

the triangles are the same,

7 = 3x + 4

7 - 4 = 3x

3 = 3x

x = 1

hope this helps, please mark it brainliest

8 0

3 years ago

Find the volume of the sphere.

Ksju [112]

Answer:

$\frac{1}{48} \pi$ units cubed

Step-by-step explanation:

The volume of a sphere is: $\frac{4}{3}\pi r^{3}$

We know the radius r = 1/4, so we just plug this into the equation:

(4/3)* $\pi$ *(1/4)^3 = (4/3)* $\pi$ *(1/64) = $\frac{1}{48} \pi$

So, the answer is $\frac{1}{48} \pi$ units cubed.

4 0

3 years ago

Read 2 more answers

How many are 16 x 16 ?

yan [13]

Answer:

256

Step-by-step explanation:

16 ×16= 256

Hope it works out for you

7 0

4 years ago

Read 2 more answers

in 2008 870 students signed up for the town soccer program. this was 125% of the number who signed up in 2004 . how many student

matrenka [14]

Answer:

653

Step-by-step explanation:

6 0

3 years ago