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Nady [450]
3 years ago
7

What is the length of BC ?

Mathematics
1 answer:
nataly862011 [7]3 years ago
3 0

Answer:

I believe the answer is D

Step-by-step explanation:

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Suppose that the IQs of university​ A's students can be described by a normal model with mean 140 and standard deviation 8 poi
AnnZ [28]

Answer:

0.0266, 0.9997,0.7856

Step-by-step explanation:

Given that the IQs of university​ A's students can be described by a normal model with mean 140 and standard deviation 8 points. Also suppose that IQs of students from university B can be described by a normal model with mean 120 and standard deviation 11. Let x be the score by A students and Y the score of B.

A)P(X>135) = \\P(Z>0.625)\\=0.0266

B) Since X and Y are independent we have

X-Y is Normal with mean = 140-120 =20 and Var (x-y)=Var(x)+Var(y) = 19

P(X-Y)>5\\\\=1-0.00029\\=0.9997

C) For a group of 3, average has std deviation = \frac{11}{\sqrt{3} } \\=6.351

P(\bar y >115)\\= P(z>\frac{-5}{6.351} \\=0.7856

3 0
3 years ago
3.005/ Write the decimal as a fraction or mixed number in simplest form.
alexdok [17]
3005/1000 or 3 3/500
4 0
3 years ago
Read 2 more answers
A dance school has 63 ballet dancers a 42% of the total number of dancers in the score ballet dancers what is the total number o
melamori03 [73]
42% of what is 63

0.42x = 63
x = 63/0.42
x = 150

There are 150 dancers in the school
3 0
4 years ago
Need help quick please!!!<br> Could you please explain the answers to both questions? Thanks!
marissa [1.9K]
For the triangle picture:

2/6 = 5/x

2x = 30

x = 15


For the other picture:

3.2/2 = a/8

The third option applies.


Other option does not apply.
Because for Option 4,
It should be 2/3.2 = b/6.4

For option 3,
it should be b/6.4 = 5/8
7 0
3 years ago
What is the area, in square units, of the parallelogram shown below?
grin007 [14]

Answer:

96 square units

Step-by-step explanation:

The area of a parallelogram is calculated by multiplying height × base

The height given for this parallelogram is 12 units and base is 8 units

12 × 8 = 96 square units

4 0
4 years ago
Read 2 more answers
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