anonymous one year ago Which number is not in scientific notation? 9 ⋅ 1019 7.8 ⋅ 106 1.45 ⋅ 10−7 0.33 ⋅ 10−15

1. anonymous

@Nnesha @kiamousekia @Preetha @campbell_st

2. anonymous

@AsoundofHeaven

3. campbell_st

scientific notation requires a number between 1 and 10 then 10 to a power, which can be positive of negative $a \times 10^b$ a is between 1 and 10 b can be a positive or negative power

4. anonymous

so do you think its A?

5. campbell_st

ok... so is 9 between 1 and 10..?

6. anonymous

yes

7. campbell_st

so that excludes A what next...

8. campbell_st

so you have 3 choices left... which one...

9. anonymous

uhmm

10. anonymous

number one

11. anonymous

ok, no i have no idea.

12. anonymous

@campbell_st i dont knwo how to do any of theese.

13. anonymous

@campbell_st HELP

14. anonymous

you do realise there are exponents riht?

15. anonymous

9 ⋅ 10^19 7.8 ⋅ 10^6 1.45 ⋅ 10^−7 0.33 ⋅ 10^−15

16. campbell_st

you have A 9 B 7.8 C 1.45 D 0.33 which one of these numbers is not between 1 and 10...?

17. anonymous

D

18. anonymous

@campbell_st

19. campbell_st

20. anonymous

oh thanks

21. anonymous

can u help me wif some more?

22. anonymous

@campbell_st