The Number of Research Articles in Physics Review That Were $A ( t ) = - 0.01 t ^ { 2 } + 0.24 t + 3.4$

question 73

Multiple Choice

The number of research articles in Physics Review that were written by researchers in the U.S. from 1983 through 1996 can be approximated by $A ( t ) = - 0.01 t ^ { 2 } + 0.24 t + 3.4$ billion dollars (t is time in years since 1983) .
Find an appropriate domain of A.

• A) \([ 0,13 ]\)
• B) \([ 1983 , + \infty ]\)
• C) \([ - \infty , 13 ]\)
• D) \([ - \infty , 0 ]\)
• E) \([ 1983,1996 ]\)

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Definitions:

Percentage

A ratio expressed as a fraction of 100.

Divisional Operating Income

Divisional operating income refers to the profit generated from the operations of a specific division within a company, excluding expenses and incomes that are not directly related to the division's operations.

Proportional Allocation

A method of distributing costs, resources, or revenues among various accounts or projects based on a predetermined criterion, such as usage or benefit.

Residual Income

The amount of income that an individual or business has after all expenses and debts have been paid.