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# All numbers must be entered as 5000 or 5e3 or 5.

All numbers must be entered as 5000 or 5e3 or 5.0e3 and not with commas as in "5,000" and not as fractions as in "3/4" and not as percentages as in "70%".

All percentages should be written as a number from 0 to 1 for 0% to 100%. This means that 45% would be written as 0.45.

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1. Estimate the population of the USA.
2. Estimate the number of mobile devices in the USA.
3. Estimate the area (in meter2) of one mobile phone.
4. using your answers above, estimate the area (in meter2) of all mobile phones in the USA.
5. Estimate the height (in meter) of our giant mobile phone. Use the provided hint.
6. Estimate the width (in meter) of our giant mobile phone. Use the provided hint.

From the last census conducted in USA, the population stands at 326770000 in 2018, the total number of mobile... View the full answer

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