Express the Sum Using Summation Notation $$a _ { n } = 0.11 n ^ { 2 } - 1.06 n + 7.29$$

question 31

Multiple Choice

Express the sum using summation notation. Use a lower limit of summation not necessarily 1 and k for the index of summation.
-The finite sequence whose general term is
$$a _ { n } = 0.11 n ^ { 2 } - 1.06 n + 7.29$$
where $n = 1,2,3 , \ldots , 9$ models the total operating costs, in millions of dollars, for a company from 1991 through $1999 .$
Find $\sum _ { \mathrm { i } = 1 } ^ { 5 } \mathrm { a } _ { \mathrm { i } }$

• A) \(\$ 26.6\) million
• B) \$31.7 million
• C) \$21.86 million
• D) \(\$ 25.36\) million

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Definitions:

Ingroup Members

Individuals who belong to the same group or category as one perceives oneself, often feeling a sense of solidarity and common identity with them.

Outgroup Members

Individuals who are perceived as not belonging to one's own group, often leading to distinction and bias against them.

Accentuation Effect

Overestimation of similarities among people within a category and dissimilarities between people from different categories.

Overestimation

The cognitive bias of assessing a quantity or quality as being larger, greater, or more important than it actually is.