Final answer:
The expression to represent Tameeka's sunflower's growth is 58 + 8N, where N represents the number of days that have passed.
Step-by-step explanation:
To represent this situation, we can use the equation:
58 + 8N
Where N represents the number of days that have passed. The initial height of the sunflower is 58 millimeters, and it grows 8 millimeters each day.
For example, if 5 days have passed, the expression would be:
58 + 8(5) = 98
So after 5 days, the sunflower would be 98 millimeters tall.