Solve the Problem $\frac { 1 } { 8 }$ Hour Longer

question 288

Multiple Choice

Solve the problem.
-In the morning, May drove to an appointment at 50 mph. Her average speed on the return trip in the afternoon was 40 mph. The return trip took $\frac { 1 } { 8 }$ hour longer. How far did she travel to the appointment?

• A) 20 mi
• B) 7.5 mi
• C) 0.5 mi
• D) 25 mi

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Definitions:

Freshman Class

A group of students who are in their first year at a secondary or post-secondary educational institution.

Sampling Distribution

The probability dispersion of a particular statistic, facilitated by a randomly selected sample.

Z-Value

A statistical measure that quantifies the number of standard deviations a data point is from the mean of a data set.

Standard Error

A measure of the statistical accuracy of an estimate, equal to the standard deviation of the theoretical distribution of a large population of such estimates.