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ANEK [815]
3 years ago
8

Pls help asap!!!

Mathematics
1 answer:
Westkost [7]3 years ago
5 0

Answer:

Step-by-step explanation:

Let x be the random variable. Since it is normally distributed and the population mean and population standard deviation are known, we would apply the formula,

z = (x - µ)/σ

Where

x = sample mean

µ = population mean

σ = standard deviation

From the information given,

µ = 474

σ = 32

x = 514

The probability of being below 514 is expressed as P(x < 514)

For x = 514,

z = (514 - 474)/32 = 1.25

Looking at the normal distribution table, the probability value corresponding to area below the z score is 0.89

Therefore,

P(x < 514) = 0.89

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Find the height of a triangle with a base of 4 1/4 cm and an area of 5 5/16 cm squared
Paha777 [63]

Answer:

hb=2.5

Step-by-step explanation:

base = 4

area  =  5

6 0
3 years ago
Pierre cut the length of an 8 cm wide plank into nine pieces and arranged them as shown in the picture. The centrepiece is a squ
kow [346]

Answer: 200cm

Step-by-step explanation:

The center Planck is a square of length 8cm.

The 4 next planks are of 16 cm each

And the next 4 Planks are of 32 cm each.

8 + 4(8×2) + 4(8×4)

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8 0
3 years ago
What is the grade if there are 85 questions and u miss 9
Irina18 [472]
If you miss 9 questions, the how many did you get right? 

85 - 9 = 76

So now you got 76 out of 85 correct or 76/85...

Now if you just do the fractional division that is described by the fraction you will get the answer.  The fraction bar literally means "divided by", so the fraction means...

76 divided by 85 which equals...

.8941

Now to convert to percentage we multiply by 100 (move the decimal 2 places to the right)

.8941 x 100 = 89.41%  Round to nearest one percent...

89%

 
5 0
3 years ago
Find the missing factor. Write your answer in<br> exponential form.
lorasvet [3.4K]

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Step-by-step explanation:

7 0
3 years ago
Z=-19i+ 14<br> What is the real part of z ?<br> What is the imaginary part of z?
Bogdan [553]

9514 1404 393

Answer:

  • Re(z) = 14
  • Im(z) = -19

Step-by-step explanation:

The real part is the term not containing i as a factor.

The imaginary part is defined differently, depending on who you read. It is either the coefficient of i (-19), or the term containing i (-19i).

Above, we have shown the results that are obtained from functions designed to give the real and imaginary parts of a complex number.

real part: 14

imaginary part: -19, or -19i

7 0
2 years ago
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