What is the 8th term of the geometric sequence 4, −20, 100, …?

Mathematics

1 answer:

Verizon [17]3 years ago

8 0

First term a= 4,
Common ratio, r=-20/4=-5
nth term = $ar^{n-1}$
The 8th term is thus;
4 $-5^{8-1}$
=4*(-78125)
=-312500

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What is three more than the product of a number and 7 equals 8 . use the variable x for the unknown number?

Anastaziya [24]

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The average maximum monthly temperature in Campinas, Brazil is 29.9 degrees Celsius. The standard deviation in maximum monthly t

velikii [3]

Answer:

3.84% of months would have a maximum temperature of 34 degrees or higher

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:

$\mu = 29.9, \sigma = 2.31$