About 7-8 years More. The real answer would be 7.14285714286
The answer for this question is 0.8
3 is C i believe, and as for 4 minerals are solid, natural.. that's about all I can say...
They are all correct good job bud I hope it helps and good luck
Hey there! The answer to your first question is SILICON, Nickle has 28 protons, silicon has 14, 14+14=28. Its the only element thats adds up. I dont know about the 2nd one myself.
