## anonymous one year ago i need help fan and medal

1. anonymous

how do you get 9.49*10^3 kg from 2.48*10^2 kg + 9.17*10^3 kg+7.2*10^1 kg

2. RamiroCruzo

@hershey21 You should firstly make all the powers same & then take them as common & then add...........

3. Rushwr

$2.48kg * 10^{2} = 2$ $9.17kg * 10^{3} = 9170kg$ $7.2 * 10^{1} = 72kg$

4. Rushwr

$248 kg *$ oops sorry for this error

5. Rushwr

$248 + 9170 + 72 = 9490kg$

6. Rushwr

$9490kg = 9.49kg * 10^{3}$

7. anonymous

nevermind about what I said I mean why did you add a zero to the and of 917

8. Rushwr

no no i think i mentioned again there was a typing error , u don't round off 2.48 * 10^2 = 248kg Look at the added value, i have added 248 ! not 2 :)

9. anonymous

nevermind about what I said I mean why did you add a zero to the and of 917

10. Rushwr

10^3 = 1000 right?

11. anonymous

yes

12. Rushwr

so 9.17kg * 1000 = 9170kg

13. anonymous

ohh ok

14. anonymous

thanks

15. Rushwr

Ok

16. anonymous

@Rushwr I have another question for this equation I'm kind of confused because of the negative but 4.07*10^-5mg +3.966*10^-4mg+ 7.1*10^-2 is the answer 4.4737*10^-5

17. Rushwr

$10^{-5} = 0.00001$ right?

18. anonymous

um how is it 0.00001 im confused

19. Rushwr

$10^{-5} = \frac{ 1 }{ 10^{5} }$ right?

20. anonymous

yes

21. Rushwr

now divide 1 by 10^5 and see what's the value u get

22. RamiroCruzo

Simply write 1 & place 4 zeroes before it so that 5 digits are after decimal point(.)

23. anonymous

wow that was much easier @RamiroCruzo

24. anonymous

so would you write one even if its 10^-6 or 10^-3

25. RamiroCruzo

Use it whenever confused, you just need to place that much digits as there are in exponent power........ 10^(6)= 0.000001

26. RamiroCruzo

@hershey21 Is it okay now mate........

27. anonymous

i think so am just redoing the equation again

28. anonymous

so is it 7.14373*10^-2

29. RamiroCruzo

Yup.......Congrats............

30. anonymous

idk why @Rushwr but thank you @RamiroCruzo and @Rushwr have a nice day :)

31. RamiroCruzo

:D