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beks73 [17]
3 years ago
7

Help me please !!!!!!!

Mathematics
1 answer:
sveticcg [70]3 years ago
4 0

Answer:

6556

Step-by-step explanation:

its this

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Suppose that the scores of a history test are normally distributed with a mean of 565 and a standard deviation of 113. a) What p
zvonat [6]

Answer:

15.39% of the scores are less than 450

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 565, \sigma = 113

What percentage of the scores are less than 450?

This is the pvalue of Z when X = 450. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{450 - 565}{113}

Z = -1.02

Z = -1.02 has a pvalue of 0.1539

15.39% of the scores are less than 450

6 0
3 years ago
A 12 inch candle and an 18 inch Candle are lit at 6 p.m. The 12 inch candle burns 0.5 inches every hour. The 18 inch candle burn
Stella [2.4K]
18 - 2H = 12 - .5H
Combine the variables
18 - 2H + .5H = 12 - .5H + .5H
18 - 1.5H = 12
Combine the whole numbers
18 - 18 - 1.5H = 12 - 18
-1.5H = -6
Divide by -1.5
-1.5H/-1.5 = -6 / -1.5
H = 4
The answer is 4 hours
7 0
3 years ago
PLEASE HELP AS SOON AS POSSIBLE!!
Serhud [2]
1. 9.86* 10 ^13
2.  5.394* 10^13
3. and 4. I don't know those questions are confusing
5. 2.3705* 10^35
6. 5^10 
7.  4^13
8. 6^ 36
9. 2.425674* 10^30
10. 1.1556* 10^13
7 0
3 years ago
Read 2 more answers
Find the missing number of each unit rate.<br><br> 20/4=?/1<br> 10/15=?/1
oksano4ka [1.4K]

Answer:

Step-by-step explanation:

divide 20 by four

20/4=5/1

now 10 and 15 can both be divided by 5 since 5 is the greatest common factor

10/15=2/3

7 0
2 years ago
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HELP ME WITH THESE TWO PLS !! I'LL GIVE BRAINLIEST
GenaCL600 [577]

Answer:

that is a two sided triangle

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3 years ago
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