anonymous
  • anonymous
i need help fan and medal
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • 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
RamiroCruzo
  • RamiroCruzo
@hershey21 You should firstly make all the powers same & then take them as common & then add...........
Rushwr
  • Rushwr
\[2.48kg * 10^{2} = 2\] \[9.17kg * 10^{3} = 9170kg\] \[7.2 * 10^{1} = 72kg\]

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Rushwr
  • Rushwr
\[248 kg * \] oops sorry for this error
Rushwr
  • Rushwr
\[248 + 9170 + 72 = 9490kg \]
Rushwr
  • Rushwr
\[9490kg = 9.49kg * 10^{3}\]
anonymous
  • anonymous
nevermind about what I said I mean why did you add a zero to the and of 917
Rushwr
  • 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 :)
anonymous
  • anonymous
nevermind about what I said I mean why did you add a zero to the and of 917
Rushwr
  • Rushwr
10^3 = 1000 right?
anonymous
  • anonymous
yes
Rushwr
  • Rushwr
so 9.17kg * 1000 = 9170kg
anonymous
  • anonymous
ohh ok
anonymous
  • anonymous
thanks
Rushwr
  • Rushwr
Ok
anonymous
  • 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
Rushwr
  • Rushwr
\[10^{-5} = 0.00001 \] right?
anonymous
  • anonymous
um how is it 0.00001 im confused
Rushwr
  • Rushwr
\[10^{-5} = \frac{ 1 }{ 10^{5} } \] right?
anonymous
  • anonymous
yes
Rushwr
  • Rushwr
now divide 1 by 10^5 and see what's the value u get
RamiroCruzo
  • RamiroCruzo
Simply write 1 & place 4 zeroes before it so that 5 digits are after decimal point(.)
anonymous
  • anonymous
wow that was much easier @RamiroCruzo
anonymous
  • anonymous
so would you write one even if its 10^-6 or 10^-3
RamiroCruzo
  • RamiroCruzo
Use it whenever confused, you just need to place that much digits as there are in exponent power........ 10^(6)= 0.000001
RamiroCruzo
  • RamiroCruzo
@hershey21 Is it okay now mate........
anonymous
  • anonymous
i think so am just redoing the equation again
anonymous
  • anonymous
so is it 7.14373*10^-2
RamiroCruzo
  • RamiroCruzo
Yup.......Congrats............
anonymous
  • anonymous
idk why @Rushwr but thank you @RamiroCruzo and @Rushwr have a nice day :)
RamiroCruzo
  • RamiroCruzo
:D

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