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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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You make skateboard ramps by cutting
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The estimated number of ramps that can be cut from the board in discuss is; 6 ramps which is a reasonable assumption provided that each ramp is about 2 feet long.

b). The number of ramps that can be cut from the 12 1/2 feet long board is 6 and hence, the length of wood left is; 1/2.

<h3>What is the number of ramps that can be cut from the 12 1/2 feet long board?</h3>

It follows from the task content that skateboard ramps are made from a 12 1/2 feet long ramp.

Consequently, on the assumption that the quantity by measure of length of the board required to make one skateboard ramp is 2 feet, it follows that the estimated number of ramps that can be made from the board is; 12/2 = 6 skateboard ramps.

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4 0
1 year ago
Ron earned 13200 in interest on an account with a principal amount of 24000 and an interest rate of 11%. How long were the funds
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Answer:

  • 5 years

Step-by-step explanation:

It is assumed the interest is simple.

<u>Use the interest formula:</u>

  • I = Prt

<u>We have:</u>

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  • P = 24000
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<u>Substitute values and solve for t:</u>

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Step-by-step explanation:

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First, we need to find all the outcomes which meet the criteria, and in this case there are 1,3,5,6,7,8,9,10. In total we have 8 outcomes that meet our criteria out of 10 outcomes,, therefore the probability of the outcome to be greater than 4 or an odd number equals...

8 / 10 = 0.8

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