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Firlakuza [10]
3 years ago
10

According to a statistical​ journal, the average lengths of a newborn is 19.6 inches with a standard deviation of 1.2 inches. Th

e distribution of lengths is approximately Normal. What is the probability that a newborn baby will have a length of 18 inches or​ less? (Please include steps)
Mathematics
1 answer:
avanturin [10]3 years ago
3 0

Answer:

9.18%

Step-by-step explanation:

First, find the z-score.

z = (x − μ) / σ

z = (18 − 19.6) / 1.2

z = -1.33

Use a chart or calculator to find the probability:

P(Z < z) = 0.0918

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Answer:

b = 12 and c = 5

Step-by-step explanation:

For them to be congruent, the triangles must be congruent by HL, so c+44 = 5b - 11 and b + 34 = 10c - 4. From the first equation, we get that c = 5b - 55. We can substitute this into the second equation and get: b + 34 = 10(5b-55) - 4 = 50b -554 -> 49b =588 -> b  = 12. We use this to solve for c: c = 5b -55 = 5(12) - 55 = 60 - 55 = 5. Therefore, b = 12 and x = 5.

I changed up my solution (sorry for the careless mistake), but I hope this helps! :)

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El maestro de matemáticas mostró una figura cuya área está representada por la siguiente expresión x² - 5x 6 = 0. ¿Cuánto miden
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