well if she has 15 now then you add 3 to 2 which is 5 then add that to the 15 so you get 20 in total then minus th3 6 she made today you get 14 divided by 2 which is 7 she made 7 yesterday and 13 today which is 20 so the answer is 7
They both orbit around the sun. They both have moons, rings, and colored bands. They both have gas giants.
The U.S. has more than 87,000 dams greater than six feet high (and two million overall). While many dams continue to provide benefits such as flood control, irrigation, and water supply, for other dams the cost of maintenance or the negative effects on communities, fish, and tribes justifies their removal.
Dam owners and regulators decide whether to remove a dam by weighing many factors including: the cost of removal and the ability to replace any lost power generation against avoided long-term maintenance; safety concerns; benefits to endangered fish populations; increased recreational and commercial fishing; and restoration of cultural values of nearby tribes.
By 2020, roughly 70% of dams will be more than 50 years old, inviting us to reconsider the value to the public of long-term investments in this infrastructure.
