Solve the problem.The population P of a predator mammal depends upon the number x of a smaller animal that is its primary food source. The population s of the smaller animal depends upon the amount a of a certain plant that is its primary food source. If 
and 
what is the relationship between the predator mammal and the plant food source?
A. P(s(a)) = 27a2 + 18a + 14
B. P(s(a)) = 9a2 + 12a + 6
C. P(s(a)) = 9a + 4
D. P(s(a)) = 27a2 + 36a + 14
Answer: D
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Provide an appropriate response.A student wanted to estimate 21.5 × 0.0079 by first rounding each number. He solved the problem as follows:21.5 × 0.0079 is approximately equal to 20 × 0.008, which is equal to 0.016. So he estimated the answer as 0.016. Do you agree with the answer? If not, explain where the student went wrong and give the correct answer.
What will be an ideal response?