is3535
  • is3535
help
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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is3535
  • is3535
@welshfella
is3535
  • is3535
3x10^20/4x10^5
welshfella
  • welshfella
ok what is 3 divided by 4 as a decimal

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welshfella
  • welshfella
you can do that with your calculator
is3535
  • is3535
0.75
is3535
  • is3535
and what is |dw:1442265028567:dw|
welshfella
  • welshfella
right now we divide the '10' parts
welshfella
  • welshfella
= 10^(20-5)
is3535
  • is3535
|dw:1442265065805:dw|
welshfella
  • welshfella
when dividing you subtract the exponents
is3535
  • is3535
|dw:1442265165234:dw|
welshfella
  • welshfella
all you need to is work out 20-5 and that's the new exponent of 10
welshfella
  • welshfella
right good but that is not scientific notation because the first number is not between 1 and 10 so to get it to the required value we multiply 0.75 by 10 to give 7.5
welshfella
  • welshfella
but 7.5 * 10^15 is not the correct answer - Its 10 times too much agreed?
welshfella
  • welshfella
we have multiplied by 10 so that makes the whole scientific number 10 times great
welshfella
  • welshfella
* greater
is3535
  • is3535
i think it is 7.5 X 10^15
welshfella
  • welshfella
no it cant be because 0.75 x 10^15 is not equal to 7.5 * 10^15 that is like saying 58 = 580
is3535
  • is3535
oh ok
welshfella
  • welshfella
So to maintain the same value as we multiplied the first part by 10 we have to divide the second part by 10 10^15 / 10^1 = 10^14
welshfella
  • welshfella
so the correct answer is 7.5 * 10^14
welshfella
  • welshfella
did you follow the argument ok?
is3535
  • is3535
ok 1 more plzz
welshfella
  • welshfella
I can't I'm sorry . I have to go and pick up my grandkids
is3535
  • is3535
ok

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