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OpenStudy (anonymous):
What is (2.1 × 10^3) × (4 × 10^–7)? A.8.4 × 10^–4 B.8.4 × 10^–3 C.8.4 × 10^3 D.8.4 × 10^4
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OpenStudy (anonymous):
Wait, I think I got it
OpenStudy (anonymous):
:)
OpenStudy (anonymous):
What did you get?
OpenStudy (anonymous):
:)
OpenStudy (anonymous):
I'm about to find out
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OpenStudy (anonymous):
Well you know 2.1*4 = 8.4 obviously since it's given, but the exponents when you multiply you're adding/ subtracting them.
OpenStudy (anonymous):
I used a calculator and got: 0.00084
OpenStudy (anonymous):
I think it might be B
OpenStudy (anonymous):
Yes, I was right. It is B :D
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