Choice A is correct! -2> -2.5
Deuterium ( 2H)
It is not radioactive. Its compounds are used in chemical analysis and solvents for hydrogen 1. Heavy water is enriched with molecules consisting of deuterium instead of protium. It used as a coolant and a neutron moderator.
Multiply the denominator by 4
(x - 4)(x^2 - 5x - 6) =
x(x^2 - 5x - 6) - 4(x^2 - 5x - 6) =
x^3 - 5x^2 - 6x - 4x^2 + 20x + 24 =
x^3 - 9x^2 + 14x + 24 <==
11. 21g
12. ?
13. X=1.35
14. X>-1
(I'm not sure about 12 because I don't have any paper to solve it at the moment. Sorry! Hope this helps anyway!)
