The formula you provided is \( d = vt \), where:
- \( d \) is the distance,
- \( v \) is the speed,
- \( t \) is the time.
To highlight the quantity of interest, which is speed (\( v \)), we can rearrange the formula.
Starting with the equation: \[ d = vt \]
We can solve for \( v \) by dividing both sides of the equation by \( t \): \[ v = \frac{d}{t} \]
Now we have highlighted the quantity of interest (speed) in the rearranged formula: \[ v = \frac{d}{t} \]
In Amelia's case, she wants to calculate the speed required to travel 388 miles in approximately 7 hours. Using this rearranged formula, she would find her required speed by substituting \( d = 388 \) miles and \( t = 7 \) hours into the formula.