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Ipatiy [6.2K]
3 years ago
7

I need help on number 19.

Mathematics
2 answers:
scoundrel [369]3 years ago
8 0
C it would be C becuse 3 8ths plus 1 4ths equals 4 8ths
8_murik_8 [283]3 years ago
6 0
Add the fractions 1/4 and 3/8
First find the LCD of 1/4 and 3/8.  8 is the LCD.
Turn 1/4 into 2/8.
Now add.
3/8+2/8=5/8

Hope this helps!
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6/10 as a decimal would be 0.6
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Answer:

The answer is -8.

Step-by-step explanation:

This is because 6 added to -8 results in -2.

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2 years ago
The Director of Admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall sem
VMariaS [17]

Answer:

Variance = 24900

Standard Deviation = 157.7973        

Step-by-step explanation:

We are given the following in the question:

Number of admissions:    1000     1200    1500

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Formula:

E(x) = \displaystyle\sum x_iP(x_i)\\E(x) = 1000(0.6) + 1200(0.3) + 1500(0.1)\\E(x) = 1110\\E(x^2) =  \displaystyle\sum x_i^2P(x_i)\\E(x^2) = (1000)^2(0.6) + (1200)^2(0.3) + (1500)^2(0.1)\\E(x^2) = 1257000

Variance =

\sigma^2 = E(x^2) - (E(x))^2\\\sigma^2 = 1257000 -(1110)^2\\\sigma^2 =24900

Thus, the variance is 24900.

Standard Deviation =

\sigma = \sqrt{\sigma^2} = \sqrt{24900} = 157.7973

Thus, the standard deviation is 157.7973

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Step-by-step explanation:

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