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Serjik [45]
3 years ago
8

Rob is setting up a model train track that is 3 3/8 feet long no telephone pole is needed at the start of the track. However alo

ng the track he places a telephone pole every 3/8. Foot a part. How many telephone poles dose he need
Mathematics
1 answer:
SOVA2 [1]3 years ago
7 0
First we need to convert 3 3/8 into 1/8ths:

3 \frac{3}{8} = \frac{27}{8}

Now, we need to see how many times 3/8 goes into 27/8:

\frac{27}{8} \div \frac{3}{8} = 27 \div 3 = 9

So we know he needs 9 telephone poles
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Trava [24]

Answer:

88.88% probability that it endures for less than a year and a half

Step-by-step explanation:

Problems of normally distributed samples can be 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 question, we have that:

\mu = 66, \sigma = 10

The next career begins on Monday; what is the likelihood that it endures for less than a year and a half?

One year has 52.14 weeks. So a year and a half has 1.5*52.14 = 78.21 weeks.

So this probability is the pvalue of Z when X = 78.21.

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

Z = \frac{78.21 - 66}{10}

Z = 1.22

Z = 1.22 has a pvalue of 0.8888

88.88% probability that it endures for less than a year and a half

6 0
3 years ago
Each cube in this figure is a -centimeter unit cube. How many cubes are in the prism? [Type your answer as a number.]
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Answer:

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Step-by-step explanation:

One face of the cube has 12 cubes. A cube has 6 faces, 12 × 6 = 72. (12 cubes × 6 faces = 72 cubes)

6 0
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Answer:

I would say A

Step-by-step explanation:

hmu if you need more help

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Answer:

D=-12  CDE=130

Step-by-step explanation:

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3 years ago
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