An Object Is Placed 60 Cm in Front of a Mirror

question 1

Multiple Choice

An object is placed 60 cm in front of a mirror and the image is upright and ¼ the size of the object. What is the focal length of the mirror?

• A) −12 cm
• B) −20 cm
• C) −45 cm
• D) −75 cm
• E) some positive value not given

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Definitions:

Economic Value

The importance or usefulness of a good or service in terms of the wealth it can generate or the well-being it can provide.

Earn

To receive payment in exchange for work or services provided, or as a return on investment.

Interest Annually

Interest calculated once a year on the principal or existing amount.

Equal Payments

Payments that are the same in amount, typically referring to the consistent and periodic payments made over the life of a loan or for a subscription service.