An Efficiency Study of the Morning Shift at a Certain $f ( x ) = - x ^ { 3 } + 7 x ^ { 2 } - 3 x$

question 14

Multiple Choice

An efficiency study of the morning shift at a certain factory indicates that an average worker arriving on the job at 7:00 A.M.will have assembled $f ( x ) = - x ^ { 3 } + 7 x ^ { 2 } - 3 x$ transistor radios x hours later.Approximately how many radios will the worker assemble between 9:00 and 9:30 A.M.?

• A)Approximately 7 radios
• B)Approximately 13 radios
• C)Approximately 14 radios
• D)Approximately 390 radios

---

Definitions:

Warranty Expense

Costs that a company expects to incur under its product warranty promises, recognized as a liability at the time of sale.

Warranty Repairs

Services provided to fix or replace defective goods within a specified period as promised by a warranty agreement.

Income Statement

A document detailing a business's income, expenditures, and net earnings or losses for a distinct timeframe.

Sales Units

The quantity of product units sold by a company within a specific period.