A water park has pools, slides, and rides that, in total, make use of 8.1*10^7 They plan to add a ride that would make use of an additional 54,000 gallons of water. Use scientific notation to express the total gallons of water made use of in the park after the new ride is installed.

The total gallons of water used in the park after the new ride is installed can be calculated as follows:

Initial total gallons of water used = 8.1 * 10^7 gallons
Additional gallons of water from new ride = 54,000 gallons

Total gallons of water after new ride = 8.1 * 10^7 + 54,000
Total gallons of water after new ride = 8.1 * 10^7 + 5.4 * 10^4
Total gallons of water after new ride = 8.1 * 10^7 + 0.54 * 10^5
Total gallons of water after new ride = 8.1 * 10^7 + 5.4 * 10^5
Total gallons of water after new ride = 8.155 * 10^7

Therefore, the total gallons of water used in the water park after the new ride is installed is 8.155 * 10^7 gallons.