Answer:
Step-by-step explanation:
You have to prime factorise 81 and then you will get <u>9</u> as the answer.
Pablo made $357 for 17 hours of work.
1 answer:
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Answer:
Step-by-step explanation:
Here, According to the question, The population of the world is 4 billion (approx).
Again According to the question, The world's population has grown at an average rate of 1.9 percent per year since 1945.
Therefore, after 1975 the growth rate will remains same.
Thus, the population of the world after t years,
(By the formula
)
⇒
Where 1.019 is the growth rate and 4 billion is the initial population.