math

how would I write this in scientific notation 04980000007507
I am getting confused with it all can you help me fine examples with this. thanks
also
how would I add this up 10^4+10^4+10^3=
is it 21000 or 10^11

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asked by jo
  1. Is there a type somewhere?

    Usually we don't write leading zeroes of whole numbers like you did in 04980000007507

    Furthermore, whether your number is a whole number or a decimal, the 7507 part at the end becomes rather "insignificant".

    How many decimal places should your answer contain?

    As to your question 10^4+10^4+10^3
    we cannot add powers with different exponents.
    In this case evaluate each one.
    so
    10^4+10^4+10^3
    = 10000 + 10000 + 1000 = 21000
    (certainly not 10^11, which would be
    100000000000 )

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    posted by Reiny

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