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kompoz [17]
3 years ago
6

Which of the following is an expression for”doubling a number n and dividing by 3”?

Mathematics
1 answer:
kirza4 [7]3 years ago
4 0

Answer:

2n/3

Step-by-step explanation:

hope this helps!! moo

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Thickness measurements of ancient prehistoric Native American pot shards discovered in a Hopi village are approximately normally
Dafna1 [17]

Answer:

a) 0.0869 = 8.69% probability that the thickness is less than 3.0 mm

b) 0.0668 = 6.68% probability that the thickness is more than 7.0 mm

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 4.9, \sigma = 1.4

(a) the thickness is less than 3.0 mm

This is the pvalue of Z when X = 3.

Z = \frac{X - \mu}{\sigma}

Z = \frac{3 - 4.9}{1.4}

Z = -1.36

Z = -1.36 has a pvalue of 0.0869

0.0869 = 8.69% probability that the thickness is less than 3.0 mm

(b) the thickness is more than 7.0 mm

This is 1 subtracted by the pvalue of Z when X = 7. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{7 - 4.9}{1.4}

Z = 1.5

Z = 1.5 has a pvalue of 0.9332

1 - 0.9332 = 0.0668

0.0668 = 6.68% probability that the thickness is more than 7.0 mm

5 0
3 years ago
5÷3010 show your work
Ymorist [56]

Answer:

just use a calculator and get 0.00166112956

3 0
3 years ago
Can someone help me with question 3 i really dont understand this.
makvit [3.9K]

Answer:28 hours

Step-by-step explanation:

2x7x2

5 0
3 years ago
Read 2 more answers
Find the midpoint from (-2,-2) to (6,6)
timama [110]
(2,2)


(x1+x2)/2, (y1-y2)/2
(-2+6)/2=(2)
(-2+6)/2=2
4 0
3 years ago
Read 2 more answers
Select the correct answer. What is the solution to the equation? 3(x + 9)^3/4 = 24​
bazaltina [42]

Answer:

C~7

Step-by-step explanation:

7 0
3 years ago
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