Scientists estimate there are _____ different plant species.
2 answers:
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Answer:
$12,087,912.1
Step-by-step explanation:
is in scientific notation, to get this into normal number, we take the decimal point and move it "9" times to the right [whatever power of 10 we have, we move to right (if positive).] Then we fillup the rest with zeros.
So we have:
This is the revenue.
We do similar process for time:
This is the time , in minutes.
We want revenue PER minute, that means we divide the total revenue by total time, that would be:
The revenue earned per minute is $12,087,912.1
The sequence is geometric, so
for some constant r. From this rule, it follows that
and we can determine the first term to be
Now, by substitution we have
and so on down to (D)
(notice how the exponent on r and the subscript on a add up to n)