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Korolek [52]
3 years ago
5

When writing twenty-one-and-a-half-trillion in scientific notation, what is the exponent needed on the base ten?

Mathematics
2 answers:
andre [41]3 years ago
7 0

Answer:

The exponent needed on the base ten is:

  • <u>10</u>.
  • 2.15X10^<u>10</u>

Step-by-step explanation:

You should know that the scientific nomenclature that is regularly used to express a trillion is:

  • 1X10^9

<u> But since the base that accompanies base 10 must always be a number less than 10, you cannot use 21.5 (which would be the ideal) but it must be the number with the decimal sign moved once to the left: 2.15</u> (the which is less than 10), since the decimal sign has been moved to the left in the base, you must increase the exponent by 1 for each digit that you ran the decimal sign, <u>as in this case the sign moved only one digit, you must increase by one the exponent, therefore the exponent will no longer be 9 but 10</u>.

  • 2.15X10^<u>10</u>
Nat2105 [25]3 years ago
5 0
1 trillion is 10^9.

Thus, 21 1/2 trillion is    21 1/2 times 10^9, or 2.15 times 10^10

Hope this helps.  If not, ask for clarification.
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