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3 years ago

Which inequality is true? 8/5 <9/10 1>6/5 5/2<2 1/2 8/4<5/2

Mathematics

1 answer:

AleksandrR [38]3 years ago

7 0

Answer:

the last one : 8/4 < 5/2

Step-by-step explanation:

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pH measurements of a chemical solutions have mean 6.8 with standard deviation 0.02. Assuming all pH measurements of this solutio

aalyn [17]

Answer: 2.14 %

Step-by-step explanation:

Given : pH measurements of a chemical solutions have

Mean : $\mu=6.8$

Standard deviation : $\sigma=0.02$

Let X be the pH reading of a randomly selected customer chemical solution.

We assume pH measurements of this solution have a nearly symmetric/bell-curve distribution (i.e. normal distribution).

The z-score for the normal distribution is given by :-

$z=\dfrac{x-\mu}{\sigma}$

For x = 6.74

$z=\dfrac{6.74-6.8}{0.02}=-3$

For x = 6.76

$z=\dfrac{6.76-6.8}{0.02}=-2$

The p-value = $P(6.74$

$P(z$

In percent, $0.0214\times=2.14\%$

Hence, the percent of pH measurements reading below 6.74 OR above 6.76 = 2.14%

6 0

3 years ago

What is (2-7i)(-1+4i)

Daniel [21]

15x, because 2 × 4x= 8x and -1×-7=7x...add 8x and 7x ull get the answer

7 0

3 years ago

I need help pls help

Black_prince [1.1K]

Answer:

550g

Step-by-step explanation:

total g in 1 kg is 1000

so 1000 - 550 =450

3 0

1 year ago

Jay has an album that holds 500 hockey cards. Each page of the album holds 5 hockey cards. If 17% of the album is empty, how m

tamaranim1 [39]

Answer: 83

Step-by-step explanation: 17% of 500 is 85. If 17% is empty, that means that you'd take away that 15%. 500 - 85 = 415. If each page holds 5 cards, we need to split those cards up between the pages. 415/5 = 83, so 83 pages will be used.

5 0

2 years ago

Someone helppppp pleaseeeeeee

Eva8 [605]

Your answer would be G.

5 0

3 years ago