21 can be written as 2.10 × 101
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You subtract the exponent of the denominator from that of the numerator.
15.236
It is: 5.08*10^8 in scientific notation and the exponent of 10 is 8
The value of the exponent is 9: (6,140,000,000 in Scientific Notation = 6.14 x 109)
Scientific Notation is expressed by using a number, using an exponent as a number (usually a decimal) multiplied by a 10, and an exponent (the number on the exponent is the number of zeros the number has).Example: 120,000,000 in scientific notation is 1.2 X 107