Jill Is 18 Kilometers Away from Joe

question 203

Multiple Choice

Jill is 18 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 2 kilometers per hour. They meet in 4 hours. How fast is Joe walking?

• A)3.5 kilometers per hour
• B)4.5 kilometers per hour
• C)2 kilometers per hour
• D)2.5 kilometers per hour

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Definitions:

Energy of Activation

The minimum amount of energy required to start a chemical reaction, often lowered by the presence of a catalyst.

Existing Bonds

Bonds that have already been issued and are currently traded in the bond market.

Required

Necessary or needed for a particular purpose or result.

Catalysts

Substances that increase the rate of a chemical reaction without being consumed in the process.