The Time It Takes a Woman to Travel from Her

question 68

Multiple Choice

The time it takes a woman to travel from her apartment to the bus station follows a uniform distribution over the interval from 20 to 30 minutes. If she leaves home at 9:05 a.m., what is the probability that she will get to the station between 9:25 and 9:30 a.m.?

• A) 1.0
• B) 0
• C) .5
• D) .25

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Definitions:

Bromecresol Purple

A pH indicator dye that changes color from yellow to purple over a pH range of approximately 5.2 to 6.8, commonly used in laboratory settings.

Buffers

Substances that help maintain the pH balance in a solution, resisting changes in pH when acids or bases are added.

Alkaline

Referring to a basic, as opposed to acidic, substance with a pH level greater than 7.

Hydroxide Ions

Negatively charged ions, OH-, produced when a hydroxide compound dissolves in water, basic in nature.