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tamaranim1 [39]
3 years ago
10

Determine for which interval(s) the function is increasing and decreasing for questions 3-5.

Mathematics
1 answer:
Solnce55 [7]3 years ago
7 0
Option D would be the correct answer.
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Given a mean of 150 and a standard deviation of 25:
pishuonlain [190]
We have to define an interval about the mean that contains 75% of the values. This means half of the values will lie above the mean and half of the values lie below the mean.

So, 37.5% of the values will lie above the mean and 37.5% of the values lie below the mean.

In a Z-table, mean is located at the center of the data. So the position of the mean is at 50% of the data. So the position of point 37.5% above the mean will be located at 50 + 37.5 = 87.5% of the overall data

Similarly position of the point 37.5% below the mean will be located at 
50 - 37.5% = 12.5% of the overall data

From the z table, we can find the z value for both these points. 12.5% converted to z score is -1.15 and 87.5% converted to z score is 1.15.

Using these z scores, we can find the values which contain 75% of the values about the mean.

z score of -1.15 means 1.15 standard deviations below the mean. So this value comes out to be:

150 - 1.15(25) = 121.25

z score of 1.15 means 1.15 standard deviations above the mean. So this value comes out to be:

150 + 1.15(25) = 178.75

So, the interval from 121.25 to 178.75 contains the 75% of the data values. 
4 0
3 years ago
Jdiidkndnkdkjdnbbdjjdjdnbdjdjkdjd
storchak [24]

Answer:

usually right now for me tax is 13% so when i and then i usually multiply by 1.13 to give me the total which would be the same for you so you need to multiply by 1.07 which is essentially c.

therefore c is the answer

7 0
3 years ago
Read 2 more answers
Fast plz help<br> i'll give 20 pts for this
Otrada [13]
Its number 1 i think
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Carmine paid an electrician x dollars per hour for a 5-hour job plus $70 for parts. The total charge was $320. Which equation ca
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Division is the answer
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5 equally sized boxes of cake mix fell off the back of jake's truck. Together they wight 925.97 pounds. How much does each box w
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925.97/5= 185.194
A: 185.194 pounds
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3 years ago
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