According to the rule of 72 if the gdp of apex federation is growing at 1.7% per year it's economy will double in approximately how many years

Hi there

the rule of 72 says
72/rate=time. To be double
So
72÷1.7=42.4 years
round your answer to get 42 years

Note that the rate is 1.7 not 0.017 as a decimal

Good luck!

The answer is biodiversity resulting from new ancestors.