2 years ago

I need help with math! I don't understand it. Can someone show me step by step.

Mathematics

1 answer:

Mars2501 [29]2 years ago

8 0

Answer:

7) refer to d=rt triangle so answer is t= d/r

8) rearrange by dividing so it should be PV/nR = T

9) move 5r to other side which become 2p = q - 5r then divide by 2. final answer is p = q-5r/2

10) multiply both side by b/1 so b got cancel on left side

right side become c(b/1) which is same as cb

then you divide both side by c to isolate b on the right side

final answer is a/c=b

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Suppose the scores of students on a statistics course are normally distributed with a mean of 476 and a standard deviation of 85

soldi70 [24.7K]

Answer: 47.72 %

Step-by-step explanation:

Given : The scores of students on a statistics course are normally distributed with a mean of $\mu=476$ and a standard deviation of $\sigma=85$ .

Let x be the random variable that represents the scores of students on a statistics course .

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

For x= 476

$z=\dfrac{476 -476 }{85}=0$

For x= 646

$z=\dfrac{646 -476 }{85}=2$

Now, the probability of the students scored between 476 and 646 on the exam will be :-

$P(476$

Hence, the percentage of the students scored between 476 and 646 on the exam = 47.72 %

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