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Naily [24]
3 years ago
6

the sum of the digits of a two-digit number is 9. when the digits are reversed, the new number is 9 more than the original numbe

r. find the original number. check your answer.
Mathematics
1 answer:
kupik [55]3 years ago
5 0

Answer:

The original number is 9...? You typed it in the question itself....

Step-by-step explanation:


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Answer:

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Step-by-step explanation:

The above question is in the form of an exponential decay. The equation for an exponential decay is given by:

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Let y represent the number of trees left and x represent the number of months. Given that there is currently 2.5 billion trees, therefore a = 2.5 * 10⁹, b = 0.5% = 0.005. The equations becomes:

y=2.5*10^9(0.005^x)\\\\After\ ten\ years(x=10*12\ months=120\ months):\\\\y=2.5*10^9(0.005^{12 0}) \\\\

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