To estimate the number of miles Jenna drove in 5 hours, we need to consider a reasonable driving speed. A typical highway speed might be around 60 miles per hour.
If Jenna drove for 5 hours at that speed, we calculate the total miles driven:
\[ \text{Miles} = \text{Speed} \times \text{Time} = 60 \text{ miles/hour} \times 5 \text{ hours} = 300 \text{ miles} \]
Now, we can express 300 miles in scientific notation:
\[ 300 = 3 \times 10^2 \text{ miles} \]
Therefore, the reasonable estimate for the number of miles Jenna drove in 5 hours is:
A. \(3 \times 10^2 , \text{mi}\)
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