A1 It means 1x103 = 1000 (three zeroes after the one)
A2 To understand why this is so, the expression 'to the power of' just means that the number concerned is multiplied by itself the appropriate number of times. Thus '10 to the power of three' means 10 x 10 x 10 which equals 1000. Scientists often use this as a shorthand way of writing large numbers.
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the power of 10 mean 10 100 1,000 100,000 the power of 10 mean 10 100 1,000 100,000
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1000ten to the power of three is 1000 because the three indicates the number of zeros
10 to the power 3 means 10*10*10, or 1000 10 to the power MINUS 3 means 1 over 10 to the power 3, so 1/1000.
Do you mean? 2/10+3/10+5/10?