Use Problem Solving Strategies to Solve the Problem

question 49

Multiple Choice

Use problem solving strategies to solve the problem.
-What's the easiest way to heat a pan of water for 9 minutes when you have only a 6-minute hour-glass timer and a 21-minute hour-glass timer?

• A)Start both timers. When the 6-min one runs out, turn it over. When it runs out again, start heating the water until the 21-min timer runs out.
• B)Start the 6-min timer. When it's halfway through start heating the water. When it runs out turn it over and heat the water until it runs out again.
• C)Can't be done.
• D)Start both timers. When the 6-min timer runs out, start heating the water. Continue until the 21-min timer runs out.

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Definitions:

User Cost

User cost comprises the costs associated with the use of a product or service, including wear and tear, maintenance, and the opportunity cost of forgone alternatives.

Extract

To remove or obtain a substance from a source through a process.

Resource

An asset or input used to produce goods and services, such as labor, capital, land, and knowledge.

Nonrenewable Resource

A natural resource that cannot be readily replaced by natural means at a quick enough pace to keep up with consumption.