Final answer:
The barometric pressure when the eye of the hurricane passed over was 26.8 inches of mercury.
Step-by-step explanation:
To find the barometric pressure when the eye of the hurricane passed over, we need to subtract the rise in pressure from the current pressure. The rise in pressure is given as 2.9 inches of mercury. So, subtracting 2.9 inches of mercury from the current pressure of 29.7 inches of mercury gives us 26.8 inches of mercury.
Therefore, the barometric pressure when the eye passed over was 26.8 inches of mercury.