To convert yards to feet, you need to know the conversion factor: 1 yard is equal to 3 feet. Therefore, to convert 30 yards to feet, you should multiply by the conversion factor.
The correct option is:
d: converting yards to feet by multiplying 30 yards by 3 ft over 1 yd.
This conversion can be set up as follows:
\[ 30 \text{ yards} \times \frac{3 \text{ ft}}{1 \text{ yard}} = 90 \text{ ft} \]
Once you have the distance in feet (90 feet), you can then use the formula \( \text{distance} = \text{velocity} \times \text{time} \) or rearranged to find time as follows:
\[ \text{time} = \frac{\text{distance}}{\text{velocity}} \]
Substituting the values:
\[ \text{time} = \frac{90 \text{ ft}}{5 \text{ ft/min}} = 18 \text{ minutes} \]
So, it will take the mouse 18 minutes to run across the 30-yard field at a speed of 5 feet per minute.
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