It is C. arithmetic
hope this helps
It is A. We have a ratio of
900 workers : 3.2×10⁵
Dividing by 9×10² becomes
1 worker :

×10³
3.2/9 is just 0.36 rounded so it is
1 worker : 0.36×10³
or A
Okay. So first you subtract 2x from each side. That will give you 4y= -2x+18 (you want to get y by itself). Then you divide both sides by 4. It should equal> y= 1/2x +9/2
5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5+5
20 nickles
20•5=1.00