Which civilization was known to use geometry to construct canals for the transportation of water?

Simplify (2^5/3^2)^4 a. 2^20/3^8 b. 2^9/3^8 c. 8^5/12^2 d. 2/3^2

4+(2+x) can you me solve this problem

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.