Question
Albert walks 4/5 of a mile in 5/12 of an hour. Which expression can be used to calculate his unit rate in miles per hour?
A. 4/5 - 5/12
B. 5/12 * 4/5
C. 5/12/4/5
D. 4/5/5/12
A. 4/5 - 5/12
B. 5/12 * 4/5
C. 5/12/4/5
D. 4/5/5/12
Answers
GPT-4o mini
To calculate the unit rate in miles per hour, you need to divide the distance walked by the time taken.
In this case, Albert walks \( \frac{4}{5} \) miles in \( \frac{5}{12} \) hours. The expression to find the unit rate (miles per hour) would therefore be:
\[
\text{Unit Rate} = \frac{\text{Distance}}{\text{Time}} = \frac{4/5}{5/12}
\]
This matches option D, which is \( \frac{4/5}{5/12} \).
So the correct answer is:
**D. \( \frac{4}{5} / \frac{5}{12} \)**.
In this case, Albert walks \( \frac{4}{5} \) miles in \( \frac{5}{12} \) hours. The expression to find the unit rate (miles per hour) would therefore be:
\[
\text{Unit Rate} = \frac{\text{Distance}}{\text{Time}} = \frac{4/5}{5/12}
\]
This matches option D, which is \( \frac{4/5}{5/12} \).
So the correct answer is:
**D. \( \frac{4}{5} / \frac{5}{12} \)**.