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3 years ago

An = a1 + (n − 1)d Find the 31st term of the sequence -22, -19, -16, -13,...

Mathematics

1 answer:

JulsSmile [24]3 years ago

4 0

Answer:

68.

Step-by-step explanation:

The common difference d = -19 - (-22) = 3

So the 31st term =

a31 = -22 + (31-1)3

= -22 + 90

= 90 - 22

= 68.

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Supposing a normal distribution, we find that:

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--------------------------------

We suppose that tree diameters are normally distributed with mean 8.8 inches and standard deviation 2.8 inches.

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Standard deviation of 2.8 inches, thus $\sigma = 2.8$ .

The interquartile range(IQR) is the difference between the 75th and the 25th percentile.

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A similar problem is given at brainly.com/question/15683591

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