A water park has pools, slides, and rides that, in total, make use of 2.1x10^7 gallons of water. They plan to add a ride that would make use of an additional 4.9x10^3 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 after the new ride is installed can be calculated by adding the current total gallons of water with the additional gallons used by the new ride:
2.1x10^7 + 4.9x10^3 = 2.1x10^7 + 0.0049x10^7
= 2.1049x10^7 gallons
Therefore, the total gallons of water used after the new ride is installed is 2.1049x10^7 gallons.