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- nuccioreggie

The amounts of household waste generated in a region during two years were 23,400,000 tons and 48,100,000 tons. What was the total household waste generated over these two years in the region, expressed in scientific notation?
7.15 ⋅ 107 tons
7.15 ⋅ 1014 tons
71.5 ⋅ 107 tons
71.5 ⋅ 1014 tons

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- nuccioreggie

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- nuccioreggie

Please help dont leave

- nuccioreggie

- nuccioreggie

- whpalmer4

Add the two numbers together, what do you get?

- nuccioreggie

I got 71,500,000

- whpalmer4

Good. How do you write that in scientific notation?

- nuccioreggie

I got B

- whpalmer4

\[7.15*10^{14}\]?
You sure about that?
\[10^{14} = 100,000,000,000,000\]

- nuccioreggie

Wait no D i jus got them mixed up its D

- whpalmer4

Scientific notation has two parts, mantissa and exponent. The mantissa is that number out from, and it is always between 1 and 10 (or -1 and -10).
Come on, stop guessing. D is\[71.5*10^{14} = 71.5*100,000,000,000,000\]

- whpalmer4

\[10^0=1\]\[10^1=10\]\[10^2=100\]\[10^3=1,000\]\[10^4=10,000\]\[10^5=100,000\]\[10^6=1,000,000\]\[10^7=10,000,000\]etc.

- nuccioreggie

Ok sorry i just did math on paper and got A

- whpalmer4

that's more like it!

- nuccioreggie

Thanks can u help me with a few more

- whpalmer4

sure, fire away, got a couple minutes

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