When a certain valve is open 281 gallons go through it in one hour. The number of gallons that would go through in 91 hour is gallons?

To find the number of gallons that would go through the valve in 91 hours, multiply the flow rate by the time: (281 \text{ gallons/hour} \times 91 \text{ hours} = 25,651 \text{ gallons}). Therefore, 25,651 gallons would go through the valve in 91 hours.