Select the following series as arithmetic, geometric, or neither. 1 + 2 + 3 + 4 + . . . + 10

1 answer:

7 0

The series is an arithmetic series.

The progression has a common difference of 1. You can tell because it involves a plus sign, which is indicative of an arithmetic progression,

A geometric progression would include multiplying the numbers by a certain amount. For example:
1, 3, 9, 27 ... 243
In this series, you multiply the numbers by three to get your answer.<span />

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IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. If a certain statistician has an of 122 ,

marusya05 [52]

Answer:

B. 93%

Step-by-step explanation:

Find the z-score:

z = (x − μ) / σ

z = (122 − 100) / 15

z = 1.47

Find the probability using a calculator or z-score table.

P(Z < 1.47) = 0.93

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2 years ago

If 40% is eliminated from 500 what is left over?

DIA [1.3K]

Answer:

300

Step-by-step explanation:

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3 years ago

The human population doubles approximately every 50 years if there were 2.5 million people in 1950 how many people are forecaste

Margarita [4]

The equation that would let us determine the number of people or population at a certain year is calculated through the equation,

A(t) = A(o)(2^(t - 1950)/50)

Substituting the known values,

A(t) = (2.5 million people)(2^(2100 - 1950)/50))

A(t) = 20 million

<em>Answer: 20 million people</em>

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3 years ago

Simplify.

TiliK225 [7]

Answer:

53.8

Step-by-step explanation:

45+8= 8

then add the decimal 0.0+0.8= 0.8

53.8

4 0

1 year ago