What is the best order-of-magnitude for 0.6?
a.10^-4
b.10^-5
c.10^-6
d.10^-7

Ill mark the brainliest if you me with the these three questions 7,8,9

Solve 3x-18=2y and 5x-6y=6 by elimination show work

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?