I got an answer for a problem but I want to know why a 7 was added to the end of it pls help. Question:
dn.net/?f=%287%2A10%5E%7B-8%7D%20%29%2B%283.48%2A10%5E%7B-5%7D%20%29" id="TexFormula1" title="(7*10^{-8} )+(3.48*10^{-5} )" alt="(7*10^{-8} )+(3.48*10^{-5} )" align="absmiddle" class="latex-formula">
Answer:

2 answers:
Answer:
because 7 needs to be there ...? for the probnem to work
Step-by-step explanation:
Answer:
In order to have the answer, 3.487×10^-5, you have to make the power of 10 into -5 :
7×10^-8 = 0.007×10^-5
e.g.
1×10^-2 = 0.01
1×10^-4 = 0.01×10^-2
(take note: when the power is negative, you have to move to the left)
Then you can solve it :
0.007×10^-5 + 3.48×10^-5
= 10^-5(0.007 + 3.48)
= 10^-5(3.487)
= 3.487×10^-5
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Answer:
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Answer:
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Step-by-step explanation:
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