###Human: Mr. Finnegan has 3 tanks with a capacity of 7000 gallons, 5000 gallons, and 3000 gallons, respectively. If he fills the first tank up to 3/4 full, the second tank with water up to 4/5 of its capacity, and the third tank up to half of its capacity, how many gallons in total are in the tanks?, ### Assistant: The capacity of the first tank is 7000 gallons, and if it is filled up to 3/4 full, it carries 3/4*7000 = 5250 gallons.
When the second tank is filled up to 4/5 of its capacity, it carries 4/5*5000 = 4000 gallons.
The total amount of water in the first two tanks is 5250+4000 = 9250 gallons.
If Mr. Finnegan fills the third tank with water up to half its capacity, the tank fills up with 1/2*3000 = 1500 gallons.
In total, the three tanks have 9350+1500 = 10850 gallons of water. 
 So the answer is :  10850