# chem

how do u put this in scientific notation 3x 10^3 +4.0 x 10^4

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1. it equals 43,000 so I would write it 4.3 *10^4...IS that what you're asking?

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2. yes do you know how you figure out the exponents?

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3. Or another way is
3 x 10^3 + 4.0 x 10^4 =
3 x 10^3 + 40 x 10^3 =
43 x 10^3 = 4.3 x 10^4

Or a third way is
0.3 x 10^4 + 4.0 x 10^4 =
4.3 x 10^4

For purposes of using some method to perform significant figures checks, I think the latter is the best.

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4. 40,000
+ 3,000
___________
43,000
to determine the exponents you put the decimal after 4. Then count how the spaces to the right after the decimal. your last decimal will be after the 0 = 10^4......does that help?

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5. yes thanks jessica and bob

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