## anonymous one year ago simplified from in scientific notation equation in comments

1. anonymous

$3\times10^{8}\div4.2\times10^{7}$

2. anonymous

@satellite73

3. anonymous

divide $$3$$ by $$4.2$$ and subtract the exponents

4. anonymous

is it $7.1\div10^{14}$

5. anonymous

then there is one more step

6. anonymous

no

7. anonymous

$7.1\div10^{1}$

8. anonymous

$10^{0}$

9. anonymous

how many decimal places are you supposed to keep?

10. anonymous

$0.71\div10^{1}$ one decimal place

11. anonymous

no $.71\times 10^1$ or $7.1$

12. anonymous

? how would it be 0.71 or 7.1