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quester [9]
3 years ago
15

Question 17, 19 and 21 ?

Mathematics
1 answer:
Vaselesa [24]3 years ago
3 0
If this is Textbook work- use SLADER (the app or the website)
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Step-by-step explanation:

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The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard devi
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Answer:

Step-by-step explanation:

Since the length of time taken on the SAT for a group of students is normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - u)/s

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s = standard deviation

From the information given,

u = 2.5 hours

s = 0.25 hours

We want to find the probability that the sample mean is between two hours and three hours.. It is expressed as

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For x = 2,

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Looking at the normal distribution table, the probability corresponding to the z score is 0.02275

For x = 3,

z = (3 - 2.5)/0.25 = 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.97725

P(2 lesser than or equal to x lesser than or equal to 3)

= 0.97725 - 0.02275 = 0.9545

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3 years ago
Given that G(x) = 5/2 * x - 7/2 what is x if G(x) = 39 Show your work.
mylen [45]

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Step-by-step explanation:

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It is just the difference between the signs
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the answer is A I hope this helps

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