You should use your calculator for such simple sums. It is far quicker and involves fewer key depressions than posting the question on WA. I could tell you the answer but how can you be sure that I did not make a mistake? Or that I am not messing about?
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no, because range is the difference of the highest limit and lowest limit,therefore 665-655 is equal to 10 and not 645..........
No, it's 10, the largest number minus the smallest number. 665-655=10
The difference is 10
Next power of 10 after 10 000 is 100 000.
I'm guessing that is: (70 000 000)² = (7×10^7)^2 = (7×10^7) × (7×10^7) = (7×7)×(10^7 × 10^7) = (7×7)×10^(7+7) = 49×10^14 = 4 900 000 000 000 000