How can you use 2, 3, 5 and 8 to get 104?

Mathematics

2 answers:

Crank3 years ago

8 0

The answer would be 8·(5*2+3)=8·(15+3)=8·13=104 i hope this helps=)

Tamiku [17]3 years ago

7 0

Salma showed me how to do it.

Here are two ways:

8 times (5·3 - 2) = 8 times (15 - 2) = 8 times 13 = 104 .

8 times (5·2 + 3) = 8 times (10 + 3) = 8 times 13 = 104.

Thank you, Salma.

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The defect length of a corrosion defect in a pressurized steel pipe is normally distributed with mean value 30 mm and standard d

skelet666 [1.2K]

Answer:

$z=-0.842$

And if we solve for a we got

$a=30 -0.842*7.8=23.432$

So the value of height that separates the bottom 20% of data from the top 80% is 23.432.

Step-by-step explanation:

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

$X \sim N(30,7.8)$

Where $\mu=30$ and $\sigma=7.8$

For this part we want to find a value a, such that we satisfy this condition:

$P(X>a)=0.80$ (a)

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If we use condition (b) from previous we have this:

$P(X$