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Harman [31]
3 years ago
14

1. A bag contains rubber bands with lengths that are normally distributed with a mean of 6 cm of length, and a standard deviatio

n of 1.5 cm. What percentage of rubber bands can be expected to be shorter than 3 cm?
Mathematics
1 answer:
romanna [79]3 years ago
4 0
Roughly 1.7 percent of the bands are shorter than 3cm. We calculate the z score of the data point in standard distribution. By definition of z score, we use score minus mean divided by standard deviation. z=(3-6)/1.5=-2. A z score of -2 corresponds to approximately 1.7%, in other words, roughly 1.7 percent of data is less than 3cm.
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alekssr [168]

There is no number I can think of that would make the statement untrue.

The result of this when you subtract 83x from both sides leaves you with P = Q.

Unless you know differently, the equation says that P must equal Q no matter what x is. If there is such a condition, it is not obvious.

3 0
3 years ago
Which of the following has two bases?<br> A. prism<br> B. pyramid<br> C. line<br> D. plane
Margaret [11]

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3 0
3 years ago
The square ABCD has side length 20 cm,
bogdanovich [222]

Answer:

AE=22.4

Step-by-step explanation:

BE is 1/2 of BC

BC is 20 cm                 All sides of a square are equal

BE = 1/2 BC                  Property of a midpoint.

BE = 10

Now just use Pythagorus

AB^2 + BE^2 = AE^2

AE^2 = 20^2 + 10^2   Perform the sqrs

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√AE^2 = √500

AE = 22.36

AE ≈ 22.4

6 0
3 years ago
Which pickle jar deal has the best price per ounce? $3.45 or 14 oz $4.35 for 16 oz $3.29 for 12 oz $4.25 for 15 oz
Allisa [31]
To find the answer divide each money amount by the cost:
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</span>4.35/16=0.271875
3.29/12=0.274166666667
4.25/15=<span>0.283333333333
</span>The pickle jar that has the best deal is 14 oz for $3.45

Hope this helps!

8 0
3 years ago
Find the sum of the sequence 36 37 38 39 ... 109=
uysha [10]
It's an arithmetic sequence:

a_1=36;\ a_2=37;\ a_3=38;\ ...\ ;\ a_{74}=109\\\\S_n=\dfrac{a_1+a_n}{2}\cdot n\\\\a_1=36;\ n=74;\ a_{74}=109\\\\S_{74}=\dfrac{36+109}{2}\cdot74=\dfrac{145}{2}\cdot74=72.5\cdot74=5365
8 0
3 years ago
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