- Why was the panama canal built in central america?

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Zn+ AgCl yields ZnCl2+ Ag balance? The half life of a radioactive element is 20 years. What percent of an initial amount of this element will remain after 40 years ? With technology you can read the mind? List the angels of triangle: ABC from smallest to largest. The first one is AB=3, BC=4, CA=5
And the second triangle is AB=20, BC=12, CA=10? Fence to be built to enclose area of 20k ft Material costs 2.50 per ft for 2 sides, 3.20 per ft for other sides Find cost of least expensive?