9 x 10^9 divided by 4.5 x 10^1 express in scientific notation chose the answer with the proper number of significant figures. Here are the options
A.) 2.0^8

B.) 2.0 x 10^8

C.) 2 x 10^8

14. complete and balance the equations for the single displacement reactions. a. zn + pb(no3)2 -> b. al + niso4 -> 15. complete and balance the equations for the double displacement reactions. a. agno3(aq) + nacl(aq) -> b. mg(no3)2(aq) + koh(aq) -> 16. complete and balance the equations for the combustion reactions. a. __ ch4 + o2 -> b. __ c3h6 + o2 -> c. + o2 ->

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?