To complete the statement about Joanna's cycling, you need to provide a specific distance value for \( d(4) \) based on the context or details you have regarding her riding speed or any other relevant information about the ride.
For example, if you know that Joanna cycles at an average speed of 12 miles per hour, then:
- \( d(4) = 12 \text{ miles/hour} \times 4 \text{ hours} = 48 \text{ miles} \)
Thus, the full completion would be:
"So, \( d(4) = 48 \). This means that after 4 hours, Joanna has cycled 48 miles."
Feel free to provide any additional context or values, and I can help refine the statement!
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