When a Person Stands 40 Cm in Front of a Cosmetic

question 147

Multiple Choice

When a person stands 40 cm in front of a cosmetic (concave) spherical mirror, the upright image is twice the size of the object. What is the focal length of the mirror?

• A) 80 cm
• B) 40 cm
• C) 27 cm
• D) 160 cm

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Definitions:

Fixed Expenses

Costs that do not fluctuate with the volume of business or level of activity within a short period.

Breakeven Point

When the expenses and the revenue are equal, so that there is no profit or loss.

Expense Function

A mathematical expression that describes how costs change with variations in the volume of activity.

Expense Functions

Mathematical formulas used to describe the relationship between expenses and other variables such as production or sales volume.