A water park has pools, slides, and rides that, in total, make use of 8.6 x 10^5 gallons of water. They plan to add a ride that would make use of an additional 9.1 x 10^4 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.
8.6 x 10^5 + 9.1 x 10^4 = (8.6 + 0.91) x 10^5
= 9.51 x 10^5
Therefore, the total gallons of water used in the park after the new ride is installed is 9.51 x 10^5 gallons.