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Vadim26 [7]
3 years ago
14

Which of the following is the rule for the geometric sequence 1, 3, 9, 27, ...?

Mathematics
2 answers:
RoseWind [281]3 years ago
7 0

Answer:

D. an =1 x 3 n-1 is the correct answer.

Step-by-step explanation:

Dmitriy789 [7]3 years ago
4 0

Answer:

Multiply by three for every number 1*3 =3 3*3=9 9*3=27

Step-by-step explanation:

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Hospital records show that a certain surgical procedure takes on an average 111.6 minutes with a standard deviation of 2.8 minut
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Answer:

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Step-by-step explanation:

The percentage is the area of the standard normal distribution curve between the values 97.6 and 125.6

The standard normal variate of the given data is found as

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

Thus for the given values Z is calculated as under

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Similarly for the other value we have

Z_2=\frac{125.6-111.6}{2.8}=5

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