Answer: Choice A
2.07 x 10 exponent of 6
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Explanation:
We stick the decimal point between the first two digits to get 2.07 and we drop the trailing zeros.
Now ask yourself: "how many places must the decimal point move to the right to go from 2.07 back to 2,070,000?". The answer would be "6 places to the right". That "6" is the exponent over the 10.
Therefore, [tex]2,070,000 = 2.07 \times 10^6[/tex] which is a number slightly larger than 2 million. Notice that the number up front 2.07 satisfies the inequality [tex]0 \le A< 10[/tex]. Choice C has 20.7 make that inequality false, so we rule out choice C.
